diff --git a/src/Tools/tim_tool/src/main.rs b/src/Tools/tim_tool/src/main.rs
index d065a6de..bf454cd4 100644
--- a/src/Tools/tim_tool/src/main.rs
+++ b/src/Tools/tim_tool/src/main.rs
@@ -1,22 +1,10 @@
 // Prevent console window in addition to Slint window in Windows release builds when, e.g., starting the app via file manager. Ignored on other platforms.
 #![cfg_attr(not(debug_assertions), windows_subsystem = "windows")]
 
-use std::error::Error;
-
 slint::include_modules!();
 
-fn main() -> Result<(), Box<dyn Error>> {
-    let ui = AppWindow::new()?;
+fn main() -> Result<(), slint::PlatformError> {
+    let main_window = MainWindow::new()?;
 
-    ui.on_request_increase_value({
-        let ui_handle = ui.as_weak();
-        move || {
-            let ui = ui_handle.unwrap();
-            ui.set_counter(ui.get_counter() + 1);
-        }
-    });
-
-    ui.run()?;
-
-    Ok(())
-}
+    main_window.run()
+}
\ No newline at end of file
diff --git a/src/Tools/tim_tool/ui/app-window.slint b/src/Tools/tim_tool/ui/app-window.slint
index a2cb9238..1b1b7399 100644
--- a/src/Tools/tim_tool/ui/app-window.slint
+++ b/src/Tools/tim_tool/ui/app-window.slint
@@ -1,19 +1,38 @@
-import { Button, VerticalBox } from "std-widgets.slint";
+component VRAMSegment inherits Rectangle {
+    in property <int> area_overlap_width;
+    in property <int> area_overlap_height;
 
-export component AppWindow inherits Window {
-    in-out property <int> counter: 42;
-    callback request-increase-value();
-    VerticalBox {
-        Text {
-            text: "Counter: \{root.counter}";
-        }
+    width:  64px;
+    height: 256px;
+    background: #37f560;
 
-        Button {
-            checked: false;
-            text: "Increase value";
-            clicked => {
-                root.request-increase-value();
-            }
-        }
+    Rectangle {
+        x:      0px;
+        y:      0px;
+        width:  area_overlap_width  >  64 ?  64px : area_overlap_width*1px;
+        height: area_overlap_height > 256 ? 256px : area_overlap_height*1px;
+        background: #d7e609;
     }
 }
+
+component VRAMArea inherits Rectangle {
+    in property <int> display_area_width;
+    in property <int> display_area_height;
+
+    for idx in 16 : VRAMSegment {
+        x:   mod(idx,8)*(64+1)*1px;
+        y: floor(idx/8)*(256+1)*1px;
+
+        area_overlap_width:  parent.display_area_width - (mod(idx,8)*64);
+        area_overlap_height: parent.display_area_height - (256*floor(idx/8));
+    }
+}
+
+export component MainWindow inherits Window {
+    VRAMArea {
+        x: 0;
+        y: 0;
+        display_area_width:  32+64+3;
+        display_area_height: 256+128;
+    }
+}
\ No newline at end of file