diff --git a/admin-lehrer/app/(admin)/ai/ocr-pipeline/types.ts b/admin-lehrer/app/(admin)/ai/ocr-pipeline/types.ts
index f836696..917dd75 100644
--- a/admin-lehrer/app/(admin)/ai/ocr-pipeline/types.ts
+++ b/admin-lehrer/app/(admin)/ai/ocr-pipeline/types.ts
@@ -84,6 +84,12 @@ export interface ColumnGroundTruth {
   notes?: string
 }
 
+export interface ManualColumnDivider {
+  xPercent: number  // Position in % of image width (0-100)
+}
+
+export type ColumnTypeKey = PageRegion['type']
+
 export const PIPELINE_STEPS: PipelineStep[] = [
   { id: 'deskew', name: 'Begradigung', icon: '📐', status: 'pending' },
   { id: 'dewarp', name: 'Entzerrung', icon: '🔧', status: 'pending' },
diff --git a/admin-lehrer/components/ocr-pipeline/ColumnControls.tsx b/admin-lehrer/components/ocr-pipeline/ColumnControls.tsx
index 329842a..e551c98 100644
--- a/admin-lehrer/components/ocr-pipeline/ColumnControls.tsx
+++ b/admin-lehrer/components/ocr-pipeline/ColumnControls.tsx
@@ -6,6 +6,7 @@ import type { ColumnResult, ColumnGroundTruth, PageRegion } from '@/app/(admin)/
 interface ColumnControlsProps {
   columnResult: ColumnResult | null
   onRerun: () => void
+  onManualMode: () => void
   onGroundTruth: (gt: ColumnGroundTruth) => void
   onNext: () => void
   isDetecting: boolean
@@ -39,7 +40,7 @@ const METHOD_LABELS: Record<string, string> = {
   position_fallback: 'Fallback',
 }
 
-export function ColumnControls({ columnResult, onRerun, onGroundTruth, onNext, isDetecting }: ColumnControlsProps) {
+export function ColumnControls({ columnResult, onRerun, onManualMode, onGroundTruth, onNext, isDetecting }: ColumnControlsProps) {
   const [gtSaved, setGtSaved] = useState(false)
 
   if (!columnResult) return null
@@ -69,6 +70,12 @@ export function ColumnControls({ columnResult, onRerun, onGroundTruth, onNext, i
         >
           Erneut erkennen
         </button>
+        <button
+          onClick={onManualMode}
+          className="text-xs px-2 py-1 bg-teal-100 text-teal-700 dark:bg-teal-900/30 dark:text-teal-400 rounded hover:bg-teal-200 dark:hover:bg-teal-900/50 transition-colors"
+        >
+          Manuell markieren
+        </button>
       </div>
 
       {/* Column list */}
diff --git a/admin-lehrer/components/ocr-pipeline/ManualColumnEditor.tsx b/admin-lehrer/components/ocr-pipeline/ManualColumnEditor.tsx
new file mode 100644
index 0000000..84b0e91
--- /dev/null
+++ b/admin-lehrer/components/ocr-pipeline/ManualColumnEditor.tsx
@@ -0,0 +1,325 @@
+'use client'
+
+import { useCallback, useEffect, useRef, useState } from 'react'
+import type { ColumnTypeKey, PageRegion } from '@/app/(admin)/ai/ocr-pipeline/types'
+
+const COLUMN_TYPES: { value: ColumnTypeKey; label: string }[] = [
+  { value: 'column_en', label: 'EN' },
+  { value: 'column_de', label: 'DE' },
+  { value: 'column_example', label: 'Beispiel' },
+  { value: 'column_text', label: 'Text' },
+  { value: 'page_ref', label: 'Seite' },
+  { value: 'column_marker', label: 'Marker' },
+]
+
+const TYPE_OVERLAY_COLORS: Record<string, string> = {
+  column_en: 'rgba(59, 130, 246, 0.12)',
+  column_de: 'rgba(34, 197, 94, 0.12)',
+  column_example: 'rgba(249, 115, 22, 0.12)',
+  column_text: 'rgba(6, 182, 212, 0.12)',
+  page_ref: 'rgba(168, 85, 247, 0.12)',
+  column_marker: 'rgba(239, 68, 68, 0.12)',
+}
+
+const TYPE_BADGE_COLORS: Record<string, string> = {
+  column_en: 'bg-blue-100 text-blue-700 dark:bg-blue-900/30 dark:text-blue-400',
+  column_de: 'bg-green-100 text-green-700 dark:bg-green-900/30 dark:text-green-400',
+  column_example: 'bg-orange-100 text-orange-700 dark:bg-orange-900/30 dark:text-orange-400',
+  column_text: 'bg-cyan-100 text-cyan-700 dark:bg-cyan-900/30 dark:text-cyan-400',
+  page_ref: 'bg-purple-100 text-purple-700 dark:bg-purple-900/30 dark:text-purple-400',
+  column_marker: 'bg-red-100 text-red-700 dark:bg-red-900/30 dark:text-red-400',
+}
+
+// Default column type sequence for newly created columns
+const DEFAULT_TYPE_SEQUENCE: ColumnTypeKey[] = [
+  'page_ref', 'column_en', 'column_de', 'column_example', 'column_text',
+]
+
+const MIN_DIVIDER_DISTANCE_PERCENT = 2 // Minimum 2% apart
+
+interface ManualColumnEditorProps {
+  imageUrl: string
+  imageWidth: number
+  imageHeight: number
+  onApply: (columns: PageRegion[]) => void
+  onCancel: () => void
+  applying: boolean
+}
+
+export function ManualColumnEditor({
+  imageUrl,
+  imageWidth,
+  imageHeight,
+  onApply,
+  onCancel,
+  applying,
+}: ManualColumnEditorProps) {
+  const containerRef = useRef<HTMLDivElement>(null)
+  const [dividers, setDividers] = useState<number[]>([]) // xPercent values
+  const [columnTypes, setColumnTypes] = useState<ColumnTypeKey[]>([])
+  const [dragging, setDragging] = useState<number | null>(null)
+  const [imageLoaded, setImageLoaded] = useState(false)
+
+  // Sync columnTypes length when dividers change
+  useEffect(() => {
+    const numColumns = dividers.length + 1
+    setColumnTypes(prev => {
+      if (prev.length === numColumns) return prev
+      const next = [...prev]
+      while (next.length < numColumns) {
+        const idx = next.length
+        next.push(DEFAULT_TYPE_SEQUENCE[idx] || 'column_text')
+      }
+      while (next.length > numColumns) {
+        next.pop()
+      }
+      return next
+    })
+  }, [dividers.length])
+
+  const getXPercent = useCallback((clientX: number): number => {
+    if (!containerRef.current) return 0
+    const rect = containerRef.current.getBoundingClientRect()
+    const pct = ((clientX - rect.left) / rect.width) * 100
+    return Math.max(0, Math.min(100, pct))
+  }, [])
+
+  const canPlaceDivider = useCallback((xPct: number, excludeIndex?: number): boolean => {
+    for (let i = 0; i < dividers.length; i++) {
+      if (i === excludeIndex) continue
+      if (Math.abs(dividers[i] - xPct) < MIN_DIVIDER_DISTANCE_PERCENT) return false
+    }
+    return xPct > MIN_DIVIDER_DISTANCE_PERCENT && xPct < (100 - MIN_DIVIDER_DISTANCE_PERCENT)
+  }, [dividers])
+
+  // Click on image to add a divider
+  const handleImageClick = useCallback((e: React.MouseEvent) => {
+    if (dragging !== null) return
+    // Don't add if clicking on a divider handle
+    if ((e.target as HTMLElement).dataset.divider) return
+
+    const xPct = getXPercent(e.clientX)
+    if (!canPlaceDivider(xPct)) return
+
+    setDividers(prev => [...prev, xPct].sort((a, b) => a - b))
+  }, [dragging, getXPercent, canPlaceDivider])
+
+  // Drag handlers
+  const handleDividerMouseDown = useCallback((e: React.MouseEvent, index: number) => {
+    e.stopPropagation()
+    e.preventDefault()
+    setDragging(index)
+  }, [])
+
+  useEffect(() => {
+    if (dragging === null) return
+
+    const handleMouseMove = (e: MouseEvent) => {
+      const xPct = getXPercent(e.clientX)
+      if (canPlaceDivider(xPct, dragging)) {
+        setDividers(prev => {
+          const next = [...prev]
+          next[dragging] = xPct
+          return next.sort((a, b) => a - b)
+        })
+      }
+    }
+
+    const handleMouseUp = () => {
+      setDragging(null)
+    }
+
+    window.addEventListener('mousemove', handleMouseMove)
+    window.addEventListener('mouseup', handleMouseUp)
+    return () => {
+      window.removeEventListener('mousemove', handleMouseMove)
+      window.removeEventListener('mouseup', handleMouseUp)
+    }
+  }, [dragging, getXPercent, canPlaceDivider])
+
+  const removeDivider = useCallback((index: number) => {
+    setDividers(prev => prev.filter((_, i) => i !== index))
+  }, [])
+
+  const updateColumnType = useCallback((colIndex: number, type: ColumnTypeKey) => {
+    setColumnTypes(prev => {
+      const next = [...prev]
+      next[colIndex] = type
+      return next
+    })
+  }, [])
+
+  const handleApply = useCallback(() => {
+    // Build PageRegion array from dividers
+    const sorted = [...dividers].sort((a, b) => a - b)
+    const columns: PageRegion[] = []
+
+    for (let i = 0; i <= sorted.length; i++) {
+      const leftPct = i === 0 ? 0 : sorted[i - 1]
+      const rightPct = i === sorted.length ? 100 : sorted[i]
+      const x = Math.round((leftPct / 100) * imageWidth)
+      const w = Math.round(((rightPct - leftPct) / 100) * imageWidth)
+
+      columns.push({
+        type: columnTypes[i] || 'column_text',
+        x,
+        y: 0,
+        width: w,
+        height: imageHeight,
+        classification_confidence: 1.0,
+        classification_method: 'manual',
+      })
+    }
+
+    onApply(columns)
+  }, [dividers, columnTypes, imageWidth, imageHeight, onApply])
+
+  // Compute column regions for overlay
+  const sorted = [...dividers].sort((a, b) => a - b)
+  const columnRegions = Array.from({ length: sorted.length + 1 }, (_, i) => ({
+    leftPct: i === 0 ? 0 : sorted[i - 1],
+    rightPct: i === sorted.length ? 100 : sorted[i],
+    type: columnTypes[i] || 'column_text',
+  }))
+
+  return (
+    <div className="space-y-4">
+      <div className="flex items-center justify-between">
+        <div className="text-sm text-gray-600 dark:text-gray-400">
+          Klicken Sie auf das Bild, um vertikale Trennlinien zu setzen.
+          {dividers.length > 0 && (
+            <span className="ml-2 font-medium text-gray-800 dark:text-gray-200">
+              {dividers.length} Linien = {dividers.length + 1} Spalten
+            </span>
+          )}
+        </div>
+        <button
+          onClick={onCancel}
+          className="text-xs px-2 py-1 text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200"
+        >
+          Abbrechen
+        </button>
+      </div>
+
+      {/* Interactive image area */}
+      <div
+        ref={containerRef}
+        className="relative border rounded-lg overflow-hidden dark:border-gray-700 bg-gray-50 dark:bg-gray-900 cursor-crosshair select-none"
+        onClick={handleImageClick}
+      >
+        {/* eslint-disable-next-line @next/next/no-img-element */}
+        <img
+          src={imageUrl}
+          alt="Entzerrtes Bild"
+          className="w-full h-auto block"
+          draggable={false}
+          onLoad={() => setImageLoaded(true)}
+        />
+
+        {imageLoaded && (
+          <>
+            {/* Column overlays */}
+            {columnRegions.map((region, i) => (
+              <div
+                key={`col-${i}`}
+                className="absolute top-0 bottom-0 pointer-events-none"
+                style={{
+                  left: `${region.leftPct}%`,
+                  width: `${region.rightPct - region.leftPct}%`,
+                  backgroundColor: TYPE_OVERLAY_COLORS[region.type] || 'rgba(128,128,128,0.08)',
+                }}
+              >
+                <span className="absolute top-1 left-1/2 -translate-x-1/2 text-[10px] font-medium text-gray-600 dark:text-gray-300 bg-white/80 dark:bg-gray-800/80 px-1 rounded">
+                  {i + 1}
+                </span>
+              </div>
+            ))}
+
+            {/* Divider lines */}
+            {sorted.map((xPct, i) => (
+              <div
+                key={`div-${i}`}
+                data-divider="true"
+                className="absolute top-0 bottom-0 group"
+                style={{
+                  left: `${xPct}%`,
+                  transform: 'translateX(-50%)',
+                  width: '12px',
+                  cursor: 'col-resize',
+                  zIndex: 10,
+                }}
+                onMouseDown={(e) => handleDividerMouseDown(e, i)}
+              >
+                {/* Visible line */}
+                <div
+                  data-divider="true"
+                  className="absolute top-0 bottom-0 left-1/2 -translate-x-1/2 w-0.5 border-l-2 border-dashed border-red-500"
+                />
+                {/* Delete button */}
+                <button
+                  data-divider="true"
+                  onClick={(e) => {
+                    e.stopPropagation()
+                    removeDivider(i)
+                  }}
+                  className="absolute top-2 left-1/2 -translate-x-1/2 w-4 h-4 bg-red-500 text-white rounded-full text-[10px] leading-none flex items-center justify-center opacity-0 group-hover:opacity-100 transition-opacity z-20"
+                  title="Linie entfernen"
+                >
+                  x
+                </button>
+              </div>
+            ))}
+          </>
+        )}
+      </div>
+
+      {/* Column type assignment */}
+      {dividers.length > 0 && (
+        <div className="bg-white dark:bg-gray-800 rounded-xl border border-gray-200 dark:border-gray-700 p-4 space-y-3">
+          <div className="text-xs font-medium text-gray-500 dark:text-gray-400 uppercase tracking-wide">
+            Spaltentypen zuweisen
+          </div>
+          <div className="grid gap-2">
+            {columnRegions.map((region, i) => (
+              <div key={i} className="flex items-center gap-3">
+                <span className={`w-16 text-center px-2 py-0.5 rounded text-xs font-medium ${TYPE_BADGE_COLORS[region.type] || 'bg-gray-100 text-gray-600'}`}>
+                  Spalte {i + 1}
+                </span>
+                <select
+                  value={columnTypes[i] || 'column_text'}
+                  onChange={(e) => updateColumnType(i, e.target.value as ColumnTypeKey)}
+                  className="text-sm border border-gray-200 dark:border-gray-600 rounded px-2 py-1 bg-white dark:bg-gray-700 text-gray-800 dark:text-gray-200"
+                >
+                  {COLUMN_TYPES.map(t => (
+                    <option key={t.value} value={t.value}>{t.label}</option>
+                  ))}
+                </select>
+                <span className="text-xs text-gray-400 font-mono">
+                  {Math.round(region.rightPct - region.leftPct)}%
+                </span>
+              </div>
+            ))}
+          </div>
+        </div>
+      )}
+
+      {/* Action buttons */}
+      <div className="flex items-center gap-3">
+        <button
+          onClick={handleApply}
+          disabled={dividers.length === 0 || applying}
+          className="px-4 py-2 bg-teal-600 text-white rounded-lg hover:bg-teal-700 transition-colors text-sm font-medium disabled:opacity-50 disabled:cursor-not-allowed"
+        >
+          {applying ? 'Wird gespeichert...' : `${dividers.length + 1} Spalten uebernehmen`}
+        </button>
+        <button
+          onClick={() => setDividers([])}
+          disabled={dividers.length === 0}
+          className="text-xs px-3 py-2 text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200 disabled:opacity-50"
+        >
+          Alle Linien entfernen
+        </button>
+      </div>
+    </div>
+  )
+}
diff --git a/admin-lehrer/components/ocr-pipeline/StepColumnDetection.tsx b/admin-lehrer/components/ocr-pipeline/StepColumnDetection.tsx
index 6f76e18..5f14fbb 100644
--- a/admin-lehrer/components/ocr-pipeline/StepColumnDetection.tsx
+++ b/admin-lehrer/components/ocr-pipeline/StepColumnDetection.tsx
@@ -1,8 +1,9 @@
 'use client'
 
 import { useCallback, useEffect, useState } from 'react'
-import type { ColumnResult, ColumnGroundTruth } from '@/app/(admin)/ai/ocr-pipeline/types'
+import type { ColumnResult, ColumnGroundTruth, PageRegion } from '@/app/(admin)/ai/ocr-pipeline/types'
 import { ColumnControls } from './ColumnControls'
+import { ManualColumnEditor } from './ManualColumnEditor'
 
 const KLAUSUR_API = '/klausur-api'
 
@@ -15,6 +16,9 @@ export function StepColumnDetection({ sessionId, onNext }: StepColumnDetectionPr
   const [columnResult, setColumnResult] = useState<ColumnResult | null>(null)
   const [detecting, setDetecting] = useState(false)
   const [error, setError] = useState<string | null>(null)
+  const [manualMode, setManualMode] = useState(false)
+  const [applying, setApplying] = useState(false)
+  const [imageDimensions, setImageDimensions] = useState<{ width: number; height: number } | null>(null)
 
   // Auto-trigger column detection on mount
   useEffect(() => {
@@ -28,6 +32,9 @@ export function StepColumnDetection({ sessionId, onNext }: StepColumnDetectionPr
         const infoRes = await fetch(`${KLAUSUR_API}/api/v1/ocr-pipeline/sessions/${sessionId}`)
         if (infoRes.ok) {
           const info = await infoRes.json()
+          if (info.image_width && info.image_height) {
+            setImageDimensions({ width: info.image_width, height: info.image_height })
+          }
           if (info.column_result) {
             setColumnResult(info.column_result)
             setDetecting(false)
@@ -86,6 +93,33 @@ export function StepColumnDetection({ sessionId, onNext }: StepColumnDetectionPr
     }
   }, [sessionId])
 
+  const handleManualApply = useCallback(async (columns: PageRegion[]) => {
+    if (!sessionId) return
+    setApplying(true)
+    setError(null)
+    try {
+      const res = await fetch(`${KLAUSUR_API}/api/v1/ocr-pipeline/sessions/${sessionId}/columns/manual`, {
+        method: 'POST',
+        headers: { 'Content-Type': 'application/json' },
+        body: JSON.stringify({ columns }),
+      })
+      if (!res.ok) {
+        const err = await res.json().catch(() => ({ detail: res.statusText }))
+        throw new Error(err.detail || 'Manuelle Spalten konnten nicht gespeichert werden')
+      }
+      const data = await res.json()
+      setColumnResult({
+        columns: data.columns,
+        duration_seconds: data.duration_seconds ?? 0,
+      })
+      setManualMode(false)
+    } catch (e) {
+      setError(e instanceof Error ? e.message : 'Fehler beim Speichern')
+    } finally {
+      setApplying(false)
+    }
+  }, [sessionId])
+
   if (!sessionId) {
     return (
       <div className="flex flex-col items-center justify-center py-16 text-center">
@@ -113,50 +147,65 @@ export function StepColumnDetection({ sessionId, onNext }: StepColumnDetectionPr
         </div>
       )}
 
-      {/* Image comparison: overlay (left) vs clean (right) */}
-      <div className="grid grid-cols-2 gap-4">
-        <div>
-          <div className="text-xs font-medium text-gray-500 dark:text-gray-400 mb-1">
-            Mit Spalten-Overlay
+      {manualMode ? (
+        /* Manual column editor */
+        <ManualColumnEditor
+          imageUrl={dewarpedUrl}
+          imageWidth={imageDimensions?.width ?? 1000}
+          imageHeight={imageDimensions?.height ?? 1400}
+          onApply={handleManualApply}
+          onCancel={() => setManualMode(false)}
+          applying={applying}
+        />
+      ) : (
+        /* Image comparison: overlay (left) vs clean (right) */
+        <div className="grid grid-cols-2 gap-4">
+          <div>
+            <div className="text-xs font-medium text-gray-500 dark:text-gray-400 mb-1">
+              Mit Spalten-Overlay
+            </div>
+            <div className="border rounded-lg overflow-hidden dark:border-gray-700 bg-gray-50 dark:bg-gray-900">
+              {columnResult ? (
+                // eslint-disable-next-line @next/next/no-img-element
+                <img
+                  src={`${overlayUrl}?t=${Date.now()}`}
+                  alt="Spalten-Overlay"
+                  className="w-full h-auto"
+                />
+              ) : (
+                <div className="aspect-[3/4] flex items-center justify-center text-gray-400 text-sm">
+                  {detecting ? 'Erkenne Spalten...' : 'Keine Daten'}
+                </div>
+              )}
+            </div>
           </div>
-          <div className="border rounded-lg overflow-hidden dark:border-gray-700 bg-gray-50 dark:bg-gray-900">
-            {columnResult ? (
-              // eslint-disable-next-line @next/next/no-img-element
+          <div>
+            <div className="text-xs font-medium text-gray-500 dark:text-gray-400 mb-1">
+              Entzerrtes Bild
+            </div>
+            <div className="border rounded-lg overflow-hidden dark:border-gray-700 bg-gray-50 dark:bg-gray-900">
+              {/* eslint-disable-next-line @next/next/no-img-element */}
               <img
-                src={`${overlayUrl}?t=${Date.now()}`}
-                alt="Spalten-Overlay"
+                src={dewarpedUrl}
+                alt="Entzerrt"
                 className="w-full h-auto"
               />
-            ) : (
-              <div className="aspect-[3/4] flex items-center justify-center text-gray-400 text-sm">
-                {detecting ? 'Erkenne Spalten...' : 'Keine Daten'}
-              </div>
-            )}
+            </div>
           </div>
         </div>
-        <div>
-          <div className="text-xs font-medium text-gray-500 dark:text-gray-400 mb-1">
-            Entzerrtes Bild
-          </div>
-          <div className="border rounded-lg overflow-hidden dark:border-gray-700 bg-gray-50 dark:bg-gray-900">
-            {/* eslint-disable-next-line @next/next/no-img-element */}
-            <img
-              src={dewarpedUrl}
-              alt="Entzerrt"
-              className="w-full h-auto"
-            />
-          </div>
-        </div>
-      </div>
+      )}
 
       {/* Controls */}
-      <ColumnControls
-        columnResult={columnResult}
-        onRerun={handleRerun}
-        onGroundTruth={handleGroundTruth}
-        onNext={onNext}
-        isDetecting={detecting}
-      />
+      {!manualMode && (
+        <ColumnControls
+          columnResult={columnResult}
+          onRerun={handleRerun}
+          onManualMode={() => setManualMode(true)}
+          onGroundTruth={handleGroundTruth}
+          onNext={onNext}
+          isDetecting={detecting}
+        />
+      )}
 
       {error && (
         <div className="p-3 bg-red-50 dark:bg-red-900/20 text-red-600 dark:text-red-400 rounded-lg text-sm">