diff --git a/client/web/src/components/panels/Document.vue b/client/web/src/components/panels/Document.vue
index 3f6cfb87..300299c1 100644
--- a/client/web/src/components/panels/Document.vue
+++ b/client/web/src/components/panels/Document.vue
@@ -34,10 +34,10 @@
 
 				<Separator :type="SeparatorType.Unrelated" />
 
-				<RadioInput v-model:index="viewModeIndex">
-					<IconButton :icon="'ViewModeNormal'" :size="24" title="View Mode: Normal" />
-					<IconButton :icon="'ViewModeOutline'" :size="24" title="View Mode: Outline" />
-					<IconButton :icon="'ViewModePixels'" :size="24" title="View Mode: Pixels" />
+				<RadioInput @update:index="viewModeChanged" v-model:index="viewModeIndex">
+					<IconButton :action="() => _" :icon="'ViewModeNormal'" :size="24" title="View Mode: Normal" />
+					<IconButton :action="() => _" :icon="'ViewModeOutline'" :size="24" title="View Mode: Outline" />
+					<IconButton :action="() => _" :icon="'ViewModePixels'" :size="24" title="View Mode: Pixels" />
 				</RadioInput>
 				<PopoverButton>
 					<h3>View Mode</h3>
@@ -46,17 +46,27 @@
 
 				<Separator :type="SeparatorType.Section" />
 
-				<NumberInput :callback="setRotation" :initialValue="0" :step="15" :unit="`°`" :updateOnCallback="false" ref="rotation" />
+				<NumberInput @update:value="setRotation" v-model:value="documentRotation" :step="15" :unit="`°`" ref="rotation" />
 
 				<Separator :type="SeparatorType.Section" />
 
-				<IconButton :icon="'ZoomIn'" :size="24" title="Zoom In" @click="this.$refs.zoom.onIncrement(1)" />
-				<IconButton :icon="'ZoomOut'" :size="24" title="Zoom Out" @click="this.$refs.zoom.onIncrement(-1)" />
-				<IconButton :icon="'ZoomReset'" :size="24" title="Zoom to 100%" @click="this.$refs.zoom.updateValue(100)" />
+				<IconButton :action="() => this.$refs.zoom.onIncrement(IncrementDirection.Increase)" :icon="'ZoomIn'" :size="24" title="Zoom In" />
+				<IconButton :action="() => this.$refs.zoom.onIncrement(IncrementDirection.Decrease)" :icon="'ZoomOut'" :size="24" title="Zoom Out" />
+				<IconButton :action="() => this.$refs.zoom.updateValue(100)" :icon="'ZoomReset'" :size="24" title="Zoom to 100%" />
 
 				<Separator :type="SeparatorType.Related" />
 
-				<NumberInput :callback="setZoom" :initialValue="100" :min="0.001" :increaseMultiplier="1.25" :decreaseMultiplier="0.8" :unit="`%`" :updateOnCallback="false" ref="zoom" />
+				<NumberInput
+					v-model:value="documentZoom"
+					@update:value="setZoom"
+					:min="0.000001"
+					:max="1000000"
+					:step="1.25"
+					:stepIsMultiplier="true"
+					:unit="`%`"
+					:displayDecimalPlaces="4"
+					ref="zoom"
+				/>
 			</div>
 		</LayoutRow>
 		<LayoutRow :class="'shelf-and-viewport'">
@@ -97,8 +107,8 @@
 				<div class="working-colors">
 					<SwatchPairInput />
 					<div class="swap-and-reset">
-						<IconButton @click="swapWorkingColors" :icon="'Swap'" title="Swap (Shift+X)" :size="16" />
-						<IconButton @click="resetWorkingColors" :icon="'ResetColors'" title="Reset (Ctrl+Shift+X)" :size="16" />
+						<IconButton :action="swapWorkingColors" :icon="'Swap'" title="Swap (Shift+X)" :size="16" />
+						<IconButton :action="resetWorkingColors" :icon="'ResetColors'" title="Reset (Ctrl+Shift+X)" :size="16" />
 					</div>
 				</div>
 			</LayoutCol>
@@ -202,20 +212,23 @@
 
 <script lang="ts">
 import { defineComponent } from "vue";
+
 import { makeModifiersBitfield } from "@/utilities/input";
 import { ResponseType, registerResponseHandler, Response, UpdateCanvas, SetActiveTool, ExportDocument, SetCanvasZoom, SetCanvasRotation } from "@/utilities/response-handler";
+import { SeparatorDirection, SeparatorType } from "@/components/widgets/widgets";
+
 import LayoutRow from "@/components/layout/LayoutRow.vue";
 import LayoutCol from "@/components/layout/LayoutCol.vue";
 import SwatchPairInput from "@/components/widgets/inputs/SwatchPairInput.vue";
 import { MenuDirection } from "@/components/widgets/floating-menus/FloatingMenu.vue";
 import ShelfItemInput from "@/components/widgets/inputs/ShelfItemInput.vue";
-import Separator, { SeparatorDirection, SeparatorType } from "@/components/widgets/separators/Separator.vue";
+import Separator from "@/components/widgets/separators/Separator.vue";
 import PersistentScrollbar, { ScrollbarDirection } from "@/components/widgets/scrollbars/PersistentScrollbar.vue";
 import CanvasRuler, { RulerDirection } from "@/components/widgets/rulers/CanvasRuler.vue";
 import IconButton from "@/components/widgets/buttons/IconButton.vue";
 import PopoverButton from "@/components/widgets/buttons/PopoverButton.vue";
 import RadioInput from "@/components/widgets/inputs/RadioInput.vue";
-import NumberInput from "@/components/widgets/inputs/NumberInput.vue";
+import NumberInput, { IncrementDirection } from "@/components/widgets/inputs/NumberInput.vue";
 import DropdownInput from "@/components/widgets/inputs/DropdownInput.vue";
 import OptionalInput from "@/components/widgets/inputs/OptionalInput.vue";
 import ToolOptions from "@/components/widgets/options/ToolOptions.vue";
@@ -322,16 +335,14 @@ export default defineComponent({
 		registerResponseHandler(ResponseType.SetCanvasZoom, (responseData: Response) => {
 			const updateData = responseData as SetCanvasZoom;
 			if (updateData) {
-				const zoomWidget = this.$refs.zoom as typeof NumberInput;
-				zoomWidget.setValue(updateData.new_zoom * 100);
+				this.documentZoom = updateData.new_zoom * 100;
 			}
 		});
 		registerResponseHandler(ResponseType.SetCanvasRotation, (responseData: Response) => {
 			const updateData = responseData as SetCanvasRotation;
 			if (updateData) {
-				const rotationWidget = this.$refs.rotation as typeof NumberInput;
 				const newRotation = updateData.new_radians * (180 / Math.PI);
-				rotationWidget.setValue((360 + (newRotation % 360)) % 360);
+				this.documentRotation = (360 + (newRotation % 360)) % 360;
 			}
 		});
 
@@ -341,8 +352,6 @@ export default defineComponent({
 
 		window.addEventListener("resize", () => this.viewportResize());
 		window.addEventListener("DOMContentLoaded", () => this.viewportResize());
-
-		this.$watch("viewModeIndex", this.viewModeChanged);
 	},
 	data() {
 		return {
@@ -356,6 +365,9 @@ export default defineComponent({
 			snappingEnabled: true,
 			gridEnabled: true,
 			overlaysEnabled: true,
+			documentRotation: 0,
+			documentZoom: 100,
+			IncrementDirection,
 			MenuDirection,
 			SeparatorDirection,
 			ScrollbarDirection,
diff --git a/client/web/src/components/panels/LayerTree.vue b/client/web/src/components/panels/LayerTree.vue
index 88ef501b..3bb61241 100644
--- a/client/web/src/components/panels/LayerTree.vue
+++ b/client/web/src/components/panels/LayerTree.vue
@@ -5,7 +5,7 @@
 
 			<Separator :type="SeparatorType.Related" />
 
-			<NumberInput v-model:value="opacity" :min="0" :max="100" :step="1" :unit="`%`" />
+			<NumberInput v-model:value="opacity" :min="0" :max="100" :unit="`%`" :displayDecimalPlaces="2" />
 
 			<Separator :type="SeparatorType.Related" />
 
@@ -18,7 +18,12 @@
 			<LayoutCol :class="'list'" @click="deselectAllLayers">
 				<div class="layer-row" v-for="layer in layers" :key="layer.path">
 					<div class="layer-visibility">
-						<IconButton :icon="layer.visible ? 'EyeVisible' : 'EyeHidden'" @click.stop="toggleLayerVisibility(layer.path)" :size="24" :title="layer.visible ? 'Visible' : 'Hidden'" />
+						<IconButton
+							:action="(e) => (toggleLayerVisibility(layer.path), e.stopPropagation())"
+							:icon="layer.visible ? 'EyeVisible' : 'EyeHidden'"
+							:size="24"
+							:title="layer.visible ? 'Visible' : 'Hidden'"
+						/>
 					</div>
 					<div
 						class="layer"
@@ -111,10 +116,13 @@
 
 <script lang="ts">
 import { defineComponent } from "vue";
+
 import { ResponseType, registerResponseHandler, Response, BlendMode, ExpandFolder, LayerPanelEntry } from "@/utilities/response-handler";
+import { SeparatorType } from "@/components/widgets/widgets";
+
 import LayoutRow from "@/components/layout/LayoutRow.vue";
 import LayoutCol from "@/components/layout/LayoutCol.vue";
-import Separator, { SeparatorType } from "@/components/widgets/separators/Separator.vue";
+import Separator from "@/components/widgets/separators/Separator.vue";
 import NumberInput from "@/components/widgets/inputs/NumberInput.vue";
 import PopoverButton from "@/components/widgets/buttons/PopoverButton.vue";
 import { MenuDirection } from "@/components/widgets/floating-menus/FloatingMenu.vue";
diff --git a/client/web/src/components/widgets/buttons/IconButton.vue b/client/web/src/components/widgets/buttons/IconButton.vue
index 6fdacfa8..91674a08 100644
--- a/client/web/src/components/widgets/buttons/IconButton.vue
+++ b/client/web/src/components/widgets/buttons/IconButton.vue
@@ -1,5 +1,5 @@
 <template>
-	<button class="icon-button" :class="`size-${String(size)}`" @click="onClick">
+	<button class="icon-button" :class="`size-${String(size)}`" @click="action">
 		<IconLabel :icon="icon" />
 	</button>
 </template>
@@ -57,10 +57,10 @@ import IconLabel from "@/components/widgets/labels/IconLabel.vue";
 
 export default defineComponent({
 	props: {
+		action: { type: Function, required: true },
 		icon: { type: String, required: true },
 		size: { type: Number, required: true },
 		gapAfter: { type: Boolean, default: false },
-		onClick: Function,
 	},
 	components: { IconLabel },
 });
diff --git a/client/web/src/components/widgets/buttons/PopoverButton.vue b/client/web/src/components/widgets/buttons/PopoverButton.vue
index baf3ae52..fa353747 100644
--- a/client/web/src/components/widgets/buttons/PopoverButton.vue
+++ b/client/web/src/components/widgets/buttons/PopoverButton.vue
@@ -1,6 +1,6 @@
 <template>
 	<div class="popover-button">
-		<IconButton :icon="icon" :size="16" @click="clickButton" data-hover-menu-spawner />
+		<IconButton :action="handleClick" :icon="icon" :size="16" data-hover-menu-spawner />
 		<FloatingMenu :type="MenuType.Popover" :direction="MenuDirection.Bottom" ref="floatingMenu">
 			<slot></slot>
 		</FloatingMenu>
@@ -63,11 +63,14 @@ export default defineComponent({
 		IconButton,
 	},
 	props: {
+		action: { type: Function, required: false },
 		icon: { type: String, default: PopoverButtonIcon.DropdownArrow },
 	},
 	methods: {
-		clickButton() {
+		handleClick() {
 			(this.$refs.floatingMenu as typeof FloatingMenu).setOpen();
+
+			if (this.action) this.action();
 		},
 	},
 	data() {
diff --git a/client/web/src/components/widgets/floating-menus/ColorPicker.vue b/client/web/src/components/widgets/floating-menus/ColorPicker.vue
index c5c719b1..0f3db7e9 100644
--- a/client/web/src/components/widgets/floating-menus/ColorPicker.vue
+++ b/client/web/src/components/widgets/floating-menus/ColorPicker.vue
@@ -131,9 +131,7 @@ const enum ColorPickerState {
 export default defineComponent({
 	components: {},
 	props: {
-		color: {
-			type: Object,
-		},
+		color: { type: Object, required: true },
 	},
 	data() {
 		return {
@@ -168,16 +166,13 @@ export default defineComponent({
 			document.addEventListener("pointermove", this.onPointerMove);
 			document.addEventListener("pointerup", this.onPointerUp);
 		},
-
 		removeEvents() {
 			document.removeEventListener("pointermove", this.onPointerMove);
 			document.removeEventListener("pointerup", this.onPointerUp);
 		},
-
 		getRef<T>(name: string) {
 			return this.$refs[name] as T;
 		},
-
 		onPointerDown(e: PointerEvent) {
 			if (!(e.currentTarget instanceof Element)) return;
 			const picker = e.currentTarget.getAttribute("data-picker-action");
@@ -200,7 +195,6 @@ export default defineComponent({
 				this.onPointerMove(e);
 			}
 		},
-
 		onPointerMove(e: PointerEvent) {
 			const { colorPicker } = this.$data._;
 
@@ -217,14 +211,12 @@ export default defineComponent({
 				this.$emit("update:color", hsvToRgb(colorPicker.color));
 			}
 		},
-
 		onPointerUp() {
 			if (this.state !== ColorPickerState.Idle) {
 				this.state = ColorPickerState.Idle;
 				this.removeEvents();
 			}
 		},
-
 		updateRects() {
 			const { colorPicker } = this.$data._;
 
@@ -249,7 +241,6 @@ export default defineComponent({
 			colorPicker.opacity.rect.left = opacity.left;
 			colorPicker.opacity.rect.top = opacity.top;
 		},
-
 		setSaturationPosition(x: number, y: number) {
 			const { colorPicker } = this.$data._;
 			const saturationCursor = this.getRef<HTMLDivElement>("saturationCursor");
@@ -258,7 +249,6 @@ export default defineComponent({
 			colorPicker.color.s = saturationPosition[0] / colorPicker.saturation.rect.width;
 			colorPicker.color.v = (1 - saturationPosition[1] / colorPicker.saturation.rect.height) * 255;
 		},
-
 		setHuePosition(y: number) {
 			const { colorPicker } = this.$data._;
 			const hueCursor = this.getRef<HTMLDivElement>("hueCursor");
@@ -266,7 +256,6 @@ export default defineComponent({
 			hueCursor.style.transform = `translateY(${huePosition}px)`;
 			colorPicker.color.h = clamp(1 - huePosition / colorPicker.hue.rect.height);
 		},
-
 		setOpacityPosition(y: number) {
 			const { colorPicker } = this.$data._;
 			const opacityCursor = this.getRef<HTMLDivElement>("opacityCursor");
@@ -274,7 +263,6 @@ export default defineComponent({
 			opacityCursor.style.transform = `translateY(${opacityPosition}px)`;
 			colorPicker.color.a = clamp(1 - opacityPosition / colorPicker.opacity.rect.height);
 		},
-
 		updateHue() {
 			const { colorPicker } = this.$data._;
 			let color = hsvToRgb({ h: colorPicker.color.h, s: 1, v: 255, a: 1 });
@@ -282,7 +270,6 @@ export default defineComponent({
 			color = hsvToRgb(colorPicker.color);
 			this.$el.style.setProperty("--opacity-picker-color", `rgb(${color.r}, ${color.g}, ${color.b})`);
 		},
-
 		updateColor() {
 			if (this.state !== ColorPickerState.Idle) return;
 			const { color } = this;
diff --git a/client/web/src/components/widgets/floating-menus/MenuList.vue b/client/web/src/components/widgets/floating-menus/MenuList.vue
index f9f9cbb8..9fa40245 100644
--- a/client/web/src/components/widgets/floating-menus/MenuList.vue
+++ b/client/web/src/components/widgets/floating-menus/MenuList.vue
@@ -120,8 +120,10 @@
 <script lang="ts">
 import { defineComponent, PropType } from "vue";
 import { keyboardLockApiSupported } from "@/utilities/fullscreen";
+import { SeparatorDirection, SeparatorType } from "@/components/widgets/widgets";
+
 import FloatingMenu, { MenuDirection, MenuType } from "@/components/widgets/floating-menus/FloatingMenu.vue";
-import Separator, { SeparatorDirection, SeparatorType } from "@/components/widgets/separators/Separator.vue";
+import Separator from "@/components/widgets/separators/Separator.vue";
 import IconLabel from "@/components/widgets/labels/IconLabel.vue";
 import UserInputLabel from "@/components/widgets/labels/UserInputLabel.vue";
 
diff --git a/client/web/src/components/widgets/inputs/DropdownInput.vue b/client/web/src/components/widgets/inputs/DropdownInput.vue
index e0255d02..a6282066 100644
--- a/client/web/src/components/widgets/inputs/DropdownInput.vue
+++ b/client/web/src/components/widgets/inputs/DropdownInput.vue
@@ -112,7 +112,7 @@ export default defineComponent({
 		selectedIndex(newSelectedIndex: number) {
 			const entries = this.menuEntries.flat();
 
-			if (newSelectedIndex >= 0 && newSelectedIndex < entries.length) {
+			if (!Number.isNaN(newSelectedIndex) && newSelectedIndex >= 0 && newSelectedIndex < entries.length) {
 				this.activeEntry = entries[newSelectedIndex];
 			} else {
 				this.activeEntry = { label: "-" };
diff --git a/client/web/src/components/widgets/inputs/NumberInput.vue b/client/web/src/components/widgets/inputs/NumberInput.vue
index 4261fd99..50996b90 100644
--- a/client/web/src/components/widgets/inputs/NumberInput.vue
+++ b/client/web/src/components/widgets/inputs/NumberInput.vue
@@ -1,8 +1,8 @@
 <template>
-	<div class="number-input">
-		<button class="arrow left" @click="onIncrement(-1)"></button>
-		<button class="arrow right" @click="onIncrement(1)"></button>
-		<input type="text" spellcheck="false" v-model="text" @change="updateText($event.target.value)" /> />
+	<div class="number-input" :class="{ disabled }">
+		<input type="text" spellcheck="false" v-model="text" @change="onTextChanged()" @keydown.esc="onCancelTextChange" ref="input" :disabled="disabled" />
+		<button v-if="!Number.isNaN(value)" class="arrow left" @click="onIncrement(IncrementDirection.Decrease)"></button>
+		<button v-if="!Number.isNaN(value)" class="arrow right" @click="onIncrement(IncrementDirection.Increase)"></button>
 	</div>
 </template>
 
@@ -17,12 +17,12 @@
 
 	input {
 		width: calc(100% - 8px);
-		margin: 0 4px;
+		line-height: 18px;
+		margin: 3px 4px;
 		outline: none;
 		border: none;
 		background: none;
 		padding: 0;
-		line-height: 24px;
 		color: var(--color-e-nearwhite);
 		font-size: inherit;
 		text-align: center;
@@ -31,6 +31,17 @@
 		&::selection {
 			background: var(--color-accent);
 		}
+
+		&:focus {
+			text-align: left;
+			width: calc(100% - 16px);
+			margin-left: 8px;
+			margin-right: 8px;
+
+			& ~ .arrow {
+				display: none;
+			}
+		}
 	}
 
 	&:not(:hover) .arrow {
@@ -89,70 +100,136 @@
 			}
 		}
 	}
+
+	&.disabled {
+		background: var(--color-2-mildblack);
+
+		input {
+			color: var(--color-8-uppergray);
+		}
+
+		.arrow {
+			display: none;
+		}
+	}
 }
 </style>
 
 <script lang="ts">
 import { defineComponent } from "vue";
 
+export enum IncrementDirection {
+	Decrease = "Decrease",
+	Increase = "Increase",
+}
+
 export default defineComponent({
 	components: {},
 	props: {
-		initialValue: { type: Number, default: 0 },
-		unit: { type: String, default: "" },
-		step: { type: Number, default: 1 },
-		displayDecimalPlaces: { type: Number, default: 3 },
-		increaseMultiplier: { type: Number, default: null },
-		decreaseMultiplier: { type: Number, default: null },
+		value: { type: Number, required: true },
 		min: { type: Number, required: false },
 		max: { type: Number, required: false },
-		callback: { type: Function, required: false },
-		updateOnCallback: { type: Boolean, default: true },
+		step: { type: Number, default: 1 },
+		stepIsMultiplier: { type: Boolean, default: false },
+		isInteger: { type: Boolean, default: false },
+		unit: { type: String, default: "" },
+		unitIsHiddenWhenEditing: { type: Boolean, default: true },
+		displayDecimalPlaces: { type: Number, default: 3 },
+		disabled: { type: Boolean, default: false },
 	},
 	data() {
 		return {
-			value: this.initialValue,
-			text: this.initialValue.toString() + this.unit,
+			text: `${this.value}${this.unit}`,
+			editing: false,
+			IncrementDirection,
 		};
 	},
 	methods: {
-		onIncrement(direction: number) {
-			if (direction === 1 && this.increaseMultiplier) this.updateValue(this.value * this.increaseMultiplier, true);
-			else if (direction === -1 && this.decreaseMultiplier) this.updateValue(this.value * this.decreaseMultiplier, true);
-			else this.updateValue(this.value + this.step * direction, true);
-		},
+		onTextFocused() {
+			if (Number.isNaN(this.value)) this.text = "";
+			else if (this.unitIsHiddenWhenEditing) this.text = `${this.value}`;
+			else this.text = `${this.value}${this.unit}`;
 
-		updateText(newText: string) {
-			const newValue = parseInt(newText, 10);
-			this.updateValue(newValue, true);
+			this.editing = true;
+			const inputElement = this.$refs.input as HTMLInputElement;
+			// Setting the value directly is required to make `inputElement.select()` work
+			inputElement.value = this.text;
+			inputElement.select();
 		},
+		// Called only when `value` is changed from the <input> element via user input and committed, either with the
+		// enter key (via the `change` event) or when the <input> element is defocused (with the `blur` event binding)
+		onTextChanged() {
+			// The `inputElement.blur()` call at the bottom of this function causes itself to be run again, so this check skips a second run
+			if (!this.editing) return;
 
-		clampValue(newValue: number, resetOnClamp: boolean) {
-			if (!Number.isFinite(newValue)) return this.value;
-			let result = newValue;
-			if (Number.isFinite(this.min) && typeof this.min === "number") {
-				if (resetOnClamp && newValue < this.min) return this.value;
-				result = Math.max(result, this.min);
-			}
-			if (Number.isFinite(this.max) && typeof this.max === "number") {
-				if (resetOnClamp && newValue > this.max) return this.value;
-				result = Math.min(result, this.max);
-			}
-			return result;
+			const newValue = parseFloat(this.text);
+			this.updateValue(newValue);
+
+			this.editing = false;
+			const inputElement = this.$refs.input as HTMLElement;
+			inputElement.blur();
 		},
-		setValue(newValue: number) {
-			this.value = newValue;
+		onCancelTextChange() {
+			this.updateValue(NaN);
+
+			this.editing = false;
+			const inputElement = this.$refs.input as HTMLElement;
+			inputElement.blur();
+		},
+		onIncrement(direction: IncrementDirection) {
+			if (Number.isNaN(this.value)) return;
+
+			if (this.stepIsMultiplier) {
+				const directionMultiplier = direction === IncrementDirection.Increase ? this.step : 1 / this.step;
+				this.updateValue(this.value * directionMultiplier);
+			} else {
+				const directionAddend = direction === IncrementDirection.Increase ? this.step : -this.step;
+				this.updateValue(this.value + directionAddend);
+			}
+		},
+		updateValue(newValue: number) {
+			let sanitized = newValue;
+
+			const invalid = Number.isNaN(newValue);
+			if (invalid) sanitized = this.value;
+
+			if (this.isInteger) sanitized = Math.round(sanitized);
+			if (typeof this.min === "number" && !Number.isNaN(this.min)) sanitized = Math.max(sanitized, this.min);
+			if (typeof this.max === "number" && !Number.isNaN(this.max)) sanitized = Math.min(sanitized, this.max);
+
+			if (!invalid) this.$emit("update:value", sanitized);
 
 			const roundingPower = 10 ** this.displayDecimalPlaces;
-			this.text = `${Math.round(this.value * roundingPower) / roundingPower}${this.unit}`;
+			const displayValue = Math.round(sanitized * roundingPower) / roundingPower;
+			this.text = `${displayValue}${this.unit}`;
 		},
-		updateValue(inValue: number, resetOnClamp: boolean) {
-			const newValue = this.clampValue(inValue, resetOnClamp);
+	},
+	watch: {
+		// Called only when `value` is changed from outside this component (with v-model)
+		value(newValue: number) {
+			if (Number.isNaN(newValue)) {
+				this.text = "-";
+				return;
+			}
 
-			if (this.callback) this.callback(newValue);
+			let sanitized = newValue;
+			if (typeof this.min === "number") sanitized = Math.max(sanitized, this.min);
+			if (typeof this.max === "number") sanitized = Math.min(sanitized, this.max);
 
-			if (this.updateOnCallback) this.setValue(newValue);
+			const roundingPower = 10 ** this.displayDecimalPlaces;
+			const displayValue = Math.round(sanitized * roundingPower) / roundingPower;
+			this.text = `${displayValue}${this.unit}`;
 		},
 	},
+	mounted() {
+		const inputElement = this.$refs.input as HTMLInputElement;
+		inputElement.addEventListener("focus", this.onTextFocused);
+		inputElement.addEventListener("blur", this.onTextChanged);
+	},
+	beforeUnmount() {
+		const inputElement = this.$refs.input as HTMLInputElement;
+		inputElement.removeEventListener("focus", this.onTextFocused);
+		inputElement.removeEventListener("blur", this.onTextChanged);
+	},
 });
 </script>
diff --git a/client/web/src/components/widgets/inputs/ShelfItemInput.vue b/client/web/src/components/widgets/inputs/ShelfItemInput.vue
index 5ff3a208..7b3eb979 100644
--- a/client/web/src/components/widgets/inputs/ShelfItemInput.vue
+++ b/client/web/src/components/widgets/inputs/ShelfItemInput.vue
@@ -1,6 +1,6 @@
 <template>
 	<div class="shelf-item-input" :class="{ active: active }">
-		<IconButton :icon="icon" :size="32" />
+		<IconButton :action="() => _" :icon="icon" :size="32" />
 	</div>
 </template>
 
diff --git a/client/web/src/components/widgets/options/ToolOptions.vue b/client/web/src/components/widgets/options/ToolOptions.vue
index 85f58fc3..451af7f9 100644
--- a/client/web/src/components/widgets/options/ToolOptions.vue
+++ b/client/web/src/components/widgets/options/ToolOptions.vue
@@ -1,13 +1,25 @@
 <template>
 	<div class="tool-options">
-		<template v-for="(option, index) in optionsMap.get(activeTool) || []" :key="index">
-			<IconButton v-if="option.kind === 'IconButton'" :icon="option.icon" :size="24" :title="option.title" :onClick="() => sendToolMessage(option.message)" />
-			<Separator v-if="option.kind === 'Separator'" :type="option.type" />
-			<PopoverButton v-if="option.kind === 'PopoverButton'">
+		<template v-for="(option, index) in toolOptions[activeTool] || []" :key="index">
+			<!-- TODO: Use `<component :is="" v-bind="attributesObject"></component>` to avoid all the separate components with `v-if` -->
+			<IconButton
+				v-if="option.kind === 'IconButton'"
+				:action="() => (option.message && sendToolMessage(option.message), option.callback && option.callback())"
+				:title="option.tooltip"
+				v-bind="option.props"
+			/>
+			<PopoverButton v-if="option.kind === 'PopoverButton'" :title="option.tooltip" :action="() => option.callback && option.callback()" v-bind="option.props">
 				<h3>{{ option.title }}</h3>
-				<p>{{ option.placeholderText }}</p>
+				<p>{{ option.text }}</p>
 			</PopoverButton>
-			<NumberInput v-if="option.kind === 'NumberInput'" :callback="option.callback" :initialValue="option.initial" :step="option.step" :min="option.min" :updateOnCallback="true" />
+			<NumberInput
+				v-if="option.kind === 'NumberInput'"
+				v-model:value="option.props.value"
+				@update:value="() => option.callback && option.callback()"
+				:title="option.tooltip"
+				v-bind="option.props"
+			/>
+			<Separator v-if="option.kind === 'Separator'" :type="option.type" />
 		</template>
 	</div>
 </template>
@@ -23,43 +35,15 @@
 
 <script lang="ts">
 import { defineComponent } from "vue";
-import Separator, { SeparatorType } from "@/components/widgets/separators/Separator.vue";
+
+import { WidgetRow, SeparatorType } from "@/components/widgets/widgets";
+import Separator from "@/components/widgets/separators/Separator.vue";
 import IconButton from "@/components/widgets/buttons/IconButton.vue";
 import PopoverButton from "@/components/widgets/buttons/PopoverButton.vue";
 import NumberInput from "@/components/widgets/inputs/NumberInput.vue";
 
 const wasm = import("@/../wasm/pkg");
 
-type ToolOptionsList = Array<ToolOptions>;
-type ToolOptionsMap = Map<string, ToolOptionsList>;
-type ToolOptions = IconButtonOption | SeparatorOption | PopoverButtonOption | NumberInputOption;
-
-interface IconButtonOption {
-	kind: "IconButton";
-	icon: string;
-	title: string;
-	message?: string | object;
-}
-
-interface SeparatorOption {
-	kind: "Separator";
-	type: SeparatorType;
-}
-
-interface PopoverButtonOption {
-	kind: "PopoverButton";
-	title: string;
-	placeholderText: string;
-}
-
-interface NumberInputOption {
-	kind: "NumberInput";
-	initial: number;
-	step: number;
-	min?: number;
-	callback?: Function;
-}
-
 export default defineComponent({
 	props: {
 		activeTool: { type: String },
@@ -75,59 +59,75 @@ export default defineComponent({
 			// This is a placeholder call, using the Shape tool as an example
 			set_tool_options(this.$props.activeTool || "", { Shape: { shape_type: { Polygon: { vertices: newValue } } } });
 		},
-		async sendToolMessage(message?: string) {
-			if (message) {
-				const { send_tool_message } = await wasm;
-				send_tool_message(this.$props.activeTool || "", message);
-			}
+		async sendToolMessage(message: string) {
+			const { send_tool_message } = await wasm;
+			send_tool_message(this.$props.activeTool || "", message);
 		},
 	},
 	data() {
-		const optionsMap: ToolOptionsMap = new Map([
-			[
-				"Select",
-				[
-					{ kind: "IconButton", icon: "AlignLeft", title: "Align Left", message: { Align: ["X", "Min"] } },
-					{ kind: "IconButton", icon: "AlignHorizontalCenter", title: "Align Horizontal Center", message: { Align: ["X", "Center"] } },
-					{ kind: "IconButton", icon: "AlignRight", title: "Align Right", message: { Align: ["X", "Max"] } },
+		const toolOptions: Record<string, WidgetRow> = {
+			Select: [
+				{ kind: "IconButton", message: { Align: ["X", "Min"] }, tooltip: "Align Left", props: { icon: "AlignLeft", size: 24 } },
+				{ kind: "IconButton", message: { Align: ["X", "Center"] }, tooltip: "Align Horizontal Center", props: { icon: "AlignHorizontalCenter", size: 24 } },
+				{ kind: "IconButton", message: { Align: ["X", "Max"] }, tooltip: "Align Right", props: { icon: "AlignRight", size: 24 } },
 
-					{ kind: "Separator", type: SeparatorType.Unrelated },
+				{ kind: "Separator", props: { type: SeparatorType.Unrelated } },
 
-					{ kind: "IconButton", icon: "AlignTop", title: "Align Top", message: { Align: ["Y", "Min"] } },
-					{ kind: "IconButton", icon: "AlignVerticalCenter", title: "Align Vertical Center", message: { Align: ["Y", "Center"] } },
-					{ kind: "IconButton", icon: "AlignBottom", title: "Align Bottom", message: { Align: ["Y", "Max"] } },
+				{ kind: "IconButton", message: { Align: ["Y", "Min"] }, tooltip: "Align Top", props: { icon: "AlignTop", size: 24 } },
+				{ kind: "IconButton", message: { Align: ["Y", "Center"] }, tooltip: "Align Vertical Center", props: { icon: "AlignVerticalCenter", size: 24 } },
+				{ kind: "IconButton", message: { Align: ["Y", "Max"] }, tooltip: "Align Bottom", props: { icon: "AlignBottom", size: 24 } },
 
-					{ kind: "Separator", type: SeparatorType.Related },
+				{ kind: "Separator", props: { type: SeparatorType.Related } },
 
-					{ kind: "PopoverButton", title: "Align", placeholderText: "More alignment-related buttons will be here" },
+				{
+					kind: "PopoverButton",
+					popover: {
+						title: "Align",
+						text: "More alignment-related buttons will be here",
+					},
+					props: {},
+				},
 
-					{ kind: "Separator", type: SeparatorType.Section },
+				{ kind: "Separator", props: { type: SeparatorType.Section } },
 
-					{ kind: "IconButton", icon: "FlipHorizontal", title: "Flip Horizontal", message: "FlipHorizontal" },
-					{ kind: "IconButton", icon: "FlipVertical", title: "Flip Vertical", message: "FlipVertical" },
+				{ kind: "IconButton", message: "FlipHorizontal", tooltip: "Flip Horizontal", props: { icon: "FlipHorizontal", size: 24 } },
+				{ kind: "IconButton", message: "FlipVertical", tooltip: "Flip Vertical", props: { icon: "FlipVertical", size: 24 } },
 
-					{ kind: "Separator", type: SeparatorType.Related },
+				{ kind: "Separator", props: { type: SeparatorType.Related } },
 
-					{ kind: "PopoverButton", title: "Flip", placeholderText: "More flip-related buttons will be here" },
+				{
+					kind: "PopoverButton",
+					popover: {
+						title: "Flip",
+						text: "More flip-related buttons will be here",
+					},
+					props: {},
+				},
 
-					{ kind: "Separator", type: SeparatorType.Section },
+				{ kind: "Separator", props: { type: SeparatorType.Section } },
 
-					{ kind: "IconButton", icon: "BooleanUnion", title: "Boolean Union" },
-					{ kind: "IconButton", icon: "BooleanSubtractFront", title: "Boolean Subtract Front" },
-					{ kind: "IconButton", icon: "BooleanSubtractBack", title: "Boolean Subtract Back" },
-					{ kind: "IconButton", icon: "BooleanIntersect", title: "Boolean Intersect" },
-					{ kind: "IconButton", icon: "BooleanDifference", title: "Boolean Difference" },
+				{ kind: "IconButton", tooltip: "Boolean Union", props: { icon: "BooleanUnion", size: 24 } },
+				{ kind: "IconButton", tooltip: "Boolean Subtract Front", props: { icon: "BooleanSubtractFront", size: 24 } },
+				{ kind: "IconButton", tooltip: "Boolean Subtract Back", props: { icon: "BooleanSubtractBack", size: 24 } },
+				{ kind: "IconButton", tooltip: "Boolean Intersect", props: { icon: "BooleanIntersect", size: 24 } },
+				{ kind: "IconButton", tooltip: "Boolean Difference", props: { icon: "BooleanDifference", size: 24 } },
 
-					{ kind: "Separator", type: SeparatorType.Related },
+				{ kind: "Separator", props: { type: SeparatorType.Related } },
 
-					{ kind: "PopoverButton", title: "Boolean", placeholderText: "More boolean-related buttons will be here" },
-				],
+				{
+					kind: "PopoverButton",
+					popover: {
+						title: "Boolean",
+						text: "More boolean-related buttons will be here",
+					},
+					props: {},
+				},
 			],
-			["Shape", [{ kind: "NumberInput", initial: 6, step: 1, min: 3, callback: this.setToolOptions }]],
-		]);
+			Shape: [{ kind: "NumberInput", callback: this.setToolOptions, props: { value: 6, min: 3, isInteger: true } }],
+		};
 
 		return {
-			optionsMap,
+			toolOptions,
 			SeparatorType,
 		};
 	},
diff --git a/client/web/src/components/widgets/separators/Separator.vue b/client/web/src/components/widgets/separators/Separator.vue
index ab9379fb..6da38a18 100644
--- a/client/web/src/components/widgets/separators/Separator.vue
+++ b/client/web/src/components/widgets/separators/Separator.vue
@@ -70,18 +70,7 @@
 
 <script lang="ts">
 import { defineComponent } from "vue";
-
-export enum SeparatorDirection {
-	"Horizontal" = "Horizontal",
-	"Vertical" = "Vertical",
-}
-
-export enum SeparatorType {
-	"Related" = "Related",
-	"Unrelated" = "Unrelated",
-	"Section" = "Section",
-	"List" = "List",
-}
+import { SeparatorDirection, SeparatorType } from "@/components/widgets/widgets";
 
 export default defineComponent({
 	components: {},
diff --git a/client/web/src/components/widgets/widgets.ts b/client/web/src/components/widgets/widgets.ts
new file mode 100644
index 00000000..6cde104f
--- /dev/null
+++ b/client/web/src/components/widgets/widgets.ts
@@ -0,0 +1,77 @@
+export type Widgets = IconButtonWidget | SeparatorWidget | PopoverButtonWidget | NumberInputWidget;
+export type WidgetRow = Array<Widgets>;
+export type WidgetLayout = Array<WidgetRow>;
+
+// Icon Button
+export interface IconButtonWidget {
+	kind: "IconButton";
+	tooltip?: string;
+	message?: string | object;
+	callback?: Function;
+	props: IconButtonProps;
+}
+
+export interface IconButtonProps {
+	// `action` is used via `IconButtonWidget.callback`
+	icon: string;
+	size: number;
+	gapAfter?: boolean;
+}
+
+// Popover Button
+export interface PopoverButtonWidget {
+	kind: "PopoverButton";
+	tooltip?: string;
+	callback?: Function;
+	// popover: WidgetLayout;
+	popover: { title: string; text: string }; // TODO: Replace this with a `WidgetLayout` like above for arbitrary layouts
+	props: PopoverButtonProps;
+}
+
+export interface PopoverButtonProps {
+	// `action` is used via `PopoverButtonWidget.callback`
+	icon?: string;
+}
+
+// Number Input
+export interface NumberInputWidget {
+	kind: "NumberInput";
+	tooltip?: string;
+	callback?: Function;
+	props: NumberInputProps;
+}
+
+export interface NumberInputProps {
+	value: number;
+	min?: number;
+	max?: number;
+	step?: number;
+	stepIsMultiplier?: boolean;
+	isInteger?: boolean;
+	unit?: string;
+	unitIsHiddenWhenEditing?: boolean;
+	displayDecimalPlaces?: number;
+}
+
+// Separator
+export interface SeparatorWidget {
+	kind: "Separator";
+	props: SeparatorProps;
+}
+
+export interface SeparatorProps {
+	direction?: SeparatorDirection;
+	type?: SeparatorType;
+}
+
+export enum SeparatorDirection {
+	"Horizontal" = "Horizontal",
+	"Vertical" = "Vertical",
+}
+
+export enum SeparatorType {
+	"Related" = "Related",
+	"Unrelated" = "Unrelated",
+	"Section" = "Section",
+	"List" = "List",
+}
diff --git a/client/web/src/components/window/status-bar/StatusBar.vue b/client/web/src/components/window/status-bar/StatusBar.vue
index 9c36b6bf..299db17d 100644
--- a/client/web/src/components/window/status-bar/StatusBar.vue
+++ b/client/web/src/components/window/status-bar/StatusBar.vue
@@ -55,8 +55,11 @@
 
 <script lang="ts">
 import { defineComponent } from "vue";
+
+import { SeparatorType } from "@/components/widgets/widgets";
+
 import UserInputLabel from "@/components/widgets/labels/UserInputLabel.vue";
-import Separator, { SeparatorType } from "@/components/widgets/separators/Separator.vue";
+import Separator from "@/components/widgets/separators/Separator.vue";
 
 export default defineComponent({
 	components: {
diff --git a/client/web/src/components/workspace/Panel.vue b/client/web/src/components/workspace/Panel.vue
index eb5ec627..8064a981 100644
--- a/client/web/src/components/workspace/Panel.vue
+++ b/client/web/src/components/workspace/Panel.vue
@@ -11,7 +11,7 @@
 					@click="handleTabClick(tabIndex)"
 				>
 					<span>{{ tabLabel }}</span>
-					<IconButton :icon="'CloseX'" :size="16" v-if="tabCloseButtons" @click.stop="handleTabClose(tabIndex)" />
+					<IconButton :action="() => handleTabClose(tabIndex)" :icon="'CloseX'" :size="16" v-if="tabCloseButtons" />
 				</div>
 			</div>
 			<PopoverButton :icon="PopoverButtonIcon.VerticalEllipsis">