diff --git a/src/EditorView.swift b/src/EditorView.swift
index ca41746..59e7d41 100644
--- a/src/EditorView.swift
+++ b/src/EditorView.swift
@@ -118,22 +118,34 @@ class MarkdownLayoutManager: NSLayoutManager {
             charOffset += lineLen + 1
         }
 
-        // Draw vertical column separators from first line pipe positions
+        // Draw vertical column separators using pipe character glyph positions
         if let firstLine = lines.first {
-            let colWidth = rect.size.width / CGFloat(max(columns, 1))
-            for col in 1..<columns {
-                let x = rect.origin.x + colWidth * CGFloat(col)
-                let colLine = NSBezierPath()
-                colLine.move(to: NSPoint(x: x, y: rect.origin.y))
-                colLine.line(to: NSPoint(x: x, y: rect.origin.y + rect.size.height))
-                colLine.lineWidth = 0.5
-                Theme.current.surface2.setStroke()
-                colLine.stroke()
+            let nsFirstLine = firstLine as NSString
+            var pipeOffsets: [Int] = []
+            for i in 0..<nsFirstLine.length {
+                if nsFirstLine.character(at: i) == UInt16(UnicodeScalar("|").value) {
+                    pipeOffsets.append(i)
+                }
+            }
+            // Skip first and last pipe (outer borders), draw inner separators
+            if pipeOffsets.count > 2 {
+                for pi in 1..<(pipeOffsets.count - 1) {
+                    let charPos = charRange.location + pipeOffsets[pi]
+                    let pipeGlyph = self.glyphRange(forCharacterRange: NSRange(location: charPos, length: 1), actualCharacterRange: nil)
+                    let pipeRect = boundingRect(forGlyphRange: pipeGlyph, in: container)
+                    let x = pipeRect.origin.x + origin.x + pipeRect.size.width / 2
+                    let colLine = NSBezierPath()
+                    colLine.move(to: NSPoint(x: x, y: rect.origin.y))
+                    colLine.line(to: NSPoint(x: x, y: rect.origin.y + rect.size.height))
+                    colLine.lineWidth = 0.5
+                    Theme.current.surface2.setStroke()
+                    colLine.stroke()
+                }
             }
 
             // Header background
             if lines.count > 1 {
-                let firstLineRange = NSRange(location: charRange.location, length: (firstLine as NSString).length)
+                let firstLineRange = NSRange(location: charRange.location, length: nsFirstLine.length)
                 let headerGlyphRange = self.glyphRange(forCharacterRange: firstLineRange, actualCharacterRange: nil)
                 var headerRect = boundingRect(forGlyphRange: headerGlyphRange, in: container)
                 headerRect.origin.x = rect.origin.x