diff --git a/CodeEditor/ViewController.swift b/CodeEditor/ViewController.swift
index 44d7a8f..838dc7c 100755
--- a/CodeEditor/ViewController.swift
+++ b/CodeEditor/ViewController.swift
@@ -7,8 +7,9 @@
 //
 
 import Cocoa
+import Quartz
 
-class ViewController: NSViewController, NSTextViewDelegate, NSTextStorageDelegate {
+class ViewController: NSViewController, NSTextViewDelegate, NSTextStorageDelegate, QLPreviewPanelDataSource, QLPreviewPanelDelegate {
     /// Appdelegate
     let app = NSApp.delegate as! AppDelegate
     
@@ -112,6 +113,14 @@ class ViewController: NSViewController, NSTextViewDelegate, NSTextStorageDelegat
         filer.saveDefaults()
     }
     
+    func numberOfPreviewItems(in panel: QLPreviewPanel!) -> Int {
+        return 1
+    }
+    
+    func previewPanel(_ panel: QLPreviewPanel!, previewItemAt index: Int) -> QLPreviewItem! {
+        return filer.currentDocument.url! as QLPreviewItem
+    }
+    
     @objc func setTheme() {
         let goDark = Settings.shared.isDarkTheme
         if #available(OSX 10.14, *) {
@@ -266,8 +275,6 @@ class ViewController: NSViewController, NSTextViewDelegate, NSTextStorageDelegat
             // Remove old attributes
             let old = NSRange(location: 0, length: textEditor.textStorage?.length ?? 0)
             textEditor.textStorage?.removeAttribute(NSAttributedString.Key.foregroundColor, range: old)
-            //textEditor.textStorage?.setAttributes([:], range: all)
-            //textEditor.textStorage?.setAttributedString(NSAttributedString(string: ""))
             textEditor.string = ""
 
             // Assign new text
@@ -283,6 +290,14 @@ class ViewController: NSViewController, NSTextViewDelegate, NSTextStorageDelegat
             } catch {
                 print("Error loading file ", file.url ?? "No file")
                 textEditor.string = "[\(file.name) is not editable]"
+                
+                // Preview with Quickview
+                if let sharedPanel = QLPreviewPanel.shared() {
+                    sharedPanel.delegate = self
+                    sharedPanel.dataSource = self
+                    sharedPanel.makeKeyAndOrderFront(self)
+                }
+                
                 resetEditor()
             }
             
diff --git a/Macaw.xcodeproj/project.pbxproj b/Macaw.xcodeproj/project.pbxproj
index da8b31b..60c1669 100755
--- a/Macaw.xcodeproj/project.pbxproj
+++ b/Macaw.xcodeproj/project.pbxproj
@@ -61,6 +61,7 @@
 		BC59EB3F2274715900880767 /* Preferences.storyboard */ = {isa = PBXFileReference; lastKnownFileType = file.storyboard; path = Preferences.storyboard; sourceTree = "<group>"; };
 		BC59EB41227472DB00880767 /* PreferencesViewController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesViewController.swift; sourceTree = "<group>"; };
 		BC59EB432274741F00880767 /* PreferencesWindowController.swift */ = {isa = PBXFileReference; lastKnownFileType = sourcecode.swift; path = PreferencesWindowController.swift; sourceTree = "<group>"; };
+		BCDD662722A1A65900A6A5C4 /* QuickLook.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = QuickLook.framework; path = System/Library/Frameworks/QuickLook.framework; sourceTree = SDKROOT; };
 		DE4AB1AB1F9D1E76006B16FA /* php.default.yaml */ = {isa = PBXFileReference; lastKnownFileType = text; path = php.default.yaml; sourceTree = "<group>"; };
 		DE500211228F1B5E00A31EFF /* Macaw.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = Macaw.entitlements; sourceTree = "<group>"; };
 /* End PBXFileReference section */
@@ -100,6 +101,7 @@
 				BC59EB3E2274713800880767 /* PreferencesWindow */,
 				3D106F341E29BFDF0081E0EC /* CodeEditor */,
 				3D106F331E29BFDF0081E0EC /* Products */,
+				BCDD662622A1A65900A6A5C4 /* Frameworks */,
 			);
 			sourceTree = "<group>";
 		};
@@ -143,6 +145,14 @@
 			path = PreferencesWindow;
 			sourceTree = "<group>";
 		};
+		BCDD662622A1A65900A6A5C4 /* Frameworks */ = {
+			isa = PBXGroup;
+			children = (
+				BCDD662722A1A65900A6A5C4 /* QuickLook.framework */,
+			);
+			name = Frameworks;
+			sourceTree = "<group>";
+		};
 /* End PBXGroup section */
 
 /* Begin PBXNativeTarget section */