diff --git a/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerDown.st b/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerDown.st
index 63d2544d..9a12437a 100644
--- a/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerDown.st
+++ b/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerDown.st
@@ -6,10 +6,10 @@ testMoveLayerDown
 	tileMatrixStack:= self editor tileMap tileMatrixStack.
 	self editor addLayer.
 	layer1 := tileMatrixStack matrixLayers at: 1.
-	layerId1 := (tileMatrixStack matrixLayers at: 1) layerIdx.
-	layerId2 := (tileMatrixStack matrixLayers at: 2) layerIdx.	
+	layerId1 := (tileMatrixStack matrixLayers at: 1) layerIndex.
+	layerId2 := (tileMatrixStack matrixLayers at: 2) layerIndex.	
 	self editor moveLayerDown.
-	self assert: (tileMatrixStack matrixLayers at: 1) layerIdx = layerId1.
-	self assert: (tileMatrixStack matrixLayers at: 2) layerIdx = layerId2.
+	self assert: (tileMatrixStack matrixLayers at: 1) layerIndex = layerId1.
+	self assert: (tileMatrixStack matrixLayers at: 2) layerIndex = layerId2.
 	self assert: (tileMatrixStack matrixLayers at: 2) == layer1.
 	self assert: ((tileMatrixStack matrixLayers at: 1) == layer1) not
\ No newline at end of file
diff --git a/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerUp.st b/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerUp.st
index 1a5e7253..8106c92b 100644
--- a/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerUp.st
+++ b/source/GM-Test.package/GMTileEditorTest.class/instance/testMoveLayerUp.st
@@ -6,11 +6,11 @@ testMoveLayerUp
 	tileMatrixStack:= self editor tileMap tileMatrixStack.
 	self editor addLayer.
 	layer1 := tileMatrixStack matrixLayers at: 1.
-	layerId1 := (tileMatrixStack matrixLayers at: 1) layerIdx.
-	layerId2 := (tileMatrixStack matrixLayers at: 2) layerIdx.	
+	layerId1 := (tileMatrixStack matrixLayers at: 1) layerIndex.
+	layerId2 := (tileMatrixStack matrixLayers at: 2) layerIndex.	
 	self editor selectOnlyLayer: 1.
 	self editor moveLayerUp.
-	self assert: (tileMatrixStack matrixLayers at: 1) layerIdx = layerId1.
-	self assert: (tileMatrixStack matrixLayers at: 2) layerIdx = layerId2.
+	self assert: (tileMatrixStack matrixLayers at: 1) layerIndex = layerId1.
+	self assert: (tileMatrixStack matrixLayers at: 2) layerIndex = layerId2.
 	self assert: (tileMatrixStack matrixLayers at: 2) == layer1.
 	self assert: ((tileMatrixStack matrixLayers at: 1) == layer1) not
\ No newline at end of file
diff --git a/source/GM-Test.package/GMTileEditorTest.class/instance/testSwapLayer.st b/source/GM-Test.package/GMTileEditorTest.class/instance/testSwapLayer.st
index 75d6143b..9be03a1c 100644
--- a/source/GM-Test.package/GMTileEditorTest.class/instance/testSwapLayer.st
+++ b/source/GM-Test.package/GMTileEditorTest.class/instance/testSwapLayer.st
@@ -6,10 +6,10 @@ testSwapLayer
 	TileMatrixStack:= self editor tileMap tileMatrixStack.
 	self editor addLayer.
 	layer1 := TileMatrixStack matrixLayers at: 1.
-	layerId1 := (TileMatrixStack matrixLayers at: 1) layerIdx.
-	layerId2 := (TileMatrixStack matrixLayers at: 2) layerIdx.	
+	layerId1 := (TileMatrixStack matrixLayers at: 1) layerIndex.
+	layerId2 := (TileMatrixStack matrixLayers at: 2) layerIndex.	
 	TileMatrixStack swapLayer: 1 with: 2.
-	self assert: (TileMatrixStack matrixLayers at: 1) layerIdx = layerId1.
-	self assert: (TileMatrixStack matrixLayers at: 2) layerIdx = layerId2.
+	self assert: (TileMatrixStack matrixLayers at: 1) layerIndex = layerId1.
+	self assert: (TileMatrixStack matrixLayers at: 2) layerIndex = layerId2.
 	self assert: (TileMatrixStack matrixLayers at: 2) == layer1.
 	self assert: ((TileMatrixStack matrixLayers at: 1) == layer1) not
\ No newline at end of file
diff --git a/source/GM-Test.package/GMTileEditorTest.class/instance/testToggleHighlightingLayer.st b/source/GM-Test.package/GMTileEditorTest.class/instance/testToggleHighlightingLayer.st
new file mode 100644
index 00000000..9e56ebea
--- /dev/null
+++ b/source/GM-Test.package/GMTileEditorTest.class/instance/testToggleHighlightingLayer.st
@@ -0,0 +1,8 @@
+layerTests
+testToggleHighlightingLayer
+	"tests the visibility toggle for the visual layer"
+	
+	self editor toggleGrid.
+	self assert: (self editor tileMap tileMatrixStackHighlighting layer: 1) visible = false.
+	self editor toggleGrid.
+	self assert: (self editor tileMap tileMatrixStackHighlighting layer: 1) visible = true
\ No newline at end of file
diff --git a/source/GM-Test.package/GMTileEditorTest.class/methodProperties.json b/source/GM-Test.package/GMTileEditorTest.class/methodProperties.json
index ee9b924a..d12db844 100644
--- a/source/GM-Test.package/GMTileEditorTest.class/methodProperties.json
+++ b/source/GM-Test.package/GMTileEditorTest.class/methodProperties.json
@@ -9,7 +9,7 @@
 		"fileUUID:" : "jj 6/22/2024 16:55",
 		"loadTestMapFileToFileDirectory" : "JS 6/23/2024 18:18",
 		"setUp" : "jj 6/23/2024 18:55",
-		"setup" : " 6/24/2024 10:17:32",
+		"setup" : "6/24/2024 10:17:32",
 		"tearDown" : "jj 6/22/2024 20:24",
 		"testAddLayerButton" : "JS 6/24/2024 00:19",
 		"testDeleteLayer" : "jj 6/22/2024 20:25",
@@ -18,12 +18,12 @@
 		"testExport" : "jj 6/23/2024 19:02",
 		"testExportButton" : "jj 6/22/2024 20:28",
 		"testImportButton" : "jj 6/22/2024 20:28",
-		"testMoveLayerDown" : "jj 6/22/2024 20:31",
-		"testMoveLayerUp" : "jj 6/22/2024 20:31",
+		"testMoveLayerDown" : "JS 6/25/2024 18:02",
+		"testMoveLayerUp" : "JS 6/25/2024 18:02",
 		"testMultiDeleteLayer" : "jj 6/22/2024 20:31",
 		"testMultiToggleLayerVisibility" : "jj 6/22/2024 20:34",
 		"testRenameLayer" : "JS 6/24/2024 00:15",
 		"testRescaleMap" : "jj 6/22/2024 20:32",
-		"testSwapLayer" : "jj 6/22/2024 20:33",
-		"testToggleLayerVisibility" : "jj 6/22/2024 20:34",
-		"testToggleHighlightingLayer" : "jj 6/22/2024 20:34" } }
+		"testSwapLayer" : "JS 6/25/2024 18:03",
+		"testToggleHighlightingLayer" : "jj 6/22/2024 20:34",
+		"testToggleLayerVisibility" : "jj 6/22/2024 20:34" } }
diff --git a/testMapFile.morph b/testMapFile.morph
index 9997ee99..14d6c90c 100644
Binary files a/testMapFile.morph and b/testMapFile.morph differ