diff --git a/GMTEIcons/redo.png b/GMTEIcons/redo.png
index 28d411a4..e39b6c33 100644
Binary files a/GMTEIcons/redo.png and b/GMTEIcons/redo.png differ
diff --git a/GMTEIcons/undo.png b/GMTEIcons/undo.png
index facd074b..7e81921b 100644
Binary files a/GMTEIcons/undo.png and b/GMTEIcons/undo.png differ
diff --git a/source/GM-TE/GMTEBrush.class.st b/source/GM-TE/GMTEBrush.class.st
index 95036485..ee4ac87e 100644
--- a/source/GM-TE/GMTEBrush.class.st
+++ b/source/GM-TE/GMTEBrush.class.st
@@ -145,6 +145,61 @@ GMTEBrush >> layer: anObject [
 	layer := anObject
 ]
 
+{
+	#category : #forms,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/9/2024 22:53'
+}
+GMTEBrush >> lineBrush [
+    | radius collection start end deltaX deltaY stepX stepY error error2 x y offsets |
+
+	radius := self radius - 1.
+	self resetOutputSet.
+	self flag: 'todo: method extraction'.
+    "Helper method to generate radius offsets"
+    offsets := OrderedCollection new.
+    (0-radius to: radius) do: [:dx |
+        (0-radius to: radius) do: [:dy |
+            (dx * dx + dy * dy <= (radius * radius)) ifTrue: [
+                offsets add: dx @ dy.
+            ].
+        ].
+    ].
+
+    self resetOutputSet.
+    (self currentMatrixIndex isNil or: [self firstMatrixIndex isNil]) ifTrue: [^nil].
+
+    start := self firstMatrixIndex.
+    end := self currentMatrixIndex.
+    deltaX := (end x - start x) abs.
+    deltaY := (end y - start y) abs.
+    stepX := (start x < end x) ifTrue: [1] ifFalse: [-1].
+    stepY := (start y < end y) ifTrue: [1] ifFalse: [-1].
+    error := deltaX - deltaY.
+    x := start x.
+    y := start y.
+
+    collection := OrderedCollection new.
+
+    [
+        | point |
+        point := x @ y.
+        offsets do: [:offset | collection add: (point + offset)].
+        (x = end x and: [y = end y]) ifTrue: [
+		self outputSet: collection asSet.
+		^ self outputSet.].
+        error2 := 2 * error.
+        (error2 > (0 - deltaY)) ifTrue: [
+            error := error - deltaY.
+            x := x + stepX.
+        ].
+        (error2 < deltaX) ifTrue: [
+            error := error + deltaX.
+            y := y + stepY.
+        ].
+    ] repeat.
+
+]
+
 {
 	#category : #accessing,
 	#'squeak_changestamp' : 'Valentin Teutschbein 7/9/2024 21:18'
@@ -255,6 +310,15 @@ GMTEBrush >> selectFillBrush [
 	self currentBrush: [self fillBrush]
 ]
 
+{
+	#category : #select,
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/9/2024 22:27'
+}
+GMTEBrush >> selectLineBrush [
+
+	self currentBrush: [self lineBrush]
+]
+
 {
 	#category : #select,
 	#'squeak_changestamp' : 'TW 7/9/2024 19:18'
diff --git a/source/GM-TE/GMTEEditor.class.st b/source/GM-TE/GMTEEditor.class.st
index 93ef3c13..3af3f074 100644
--- a/source/GM-TE/GMTEEditor.class.st
+++ b/source/GM-TE/GMTEEditor.class.st
@@ -1237,7 +1237,7 @@ GMTEEditor >> initialize [
 
 {
 	#category : #initialization,
-	#'squeak_changestamp' : 'TW 7/9/2024 19:42'
+	#'squeak_changestamp' : 'Valentin Teutschbein 7/9/2024 22:40'
 }
 GMTEEditor >> initializeBrush [
 	"starts the tile editor"
@@ -1246,7 +1246,7 @@ GMTEEditor >> initializeBrush [
 		brush: GMTEBrush new;
 		selectRadiusBrush;
 		initializeBrushButton;
-		setBrushRadius: 0
+		setBrushRadius: 1
 ]
 
 {