diff --git a/apps/gipy/ChangeLog b/apps/gipy/ChangeLog
index 2835488e2..d46d24c69 100644
--- a/apps/gipy/ChangeLog
+++ b/apps/gipy/ChangeLog
@@ -120,10 +120,11 @@
 	* New display algorithm : way faster, larger roads, zooming out is now ok
 	* You will need to re-generate your maps because the new algorithm uses a different scale
 	* Better path simplification
-	* Waypoints autodetection using the map
-	* New option: sleep between waypoints
 	* Removed sharp turns auto-detection
+	* Waypoints autodetection using the map : this will generate more points than really needed but can still be effective.
+	* New option: sleep between waypoints
 	* Interface: centered svg preview + display file sizes
 	* Interface: disable/enable waypoints detection and elevation
 	* Touching the screen when sleeping will wake up but not change screen
-	* Removing footways (if bicycles not allowed) to reduce resource usage
\ No newline at end of file
+	* Removing footways (if bicycles not allowed) to reduce resource usage
+	* Switching screen will clear the screen immediately so you can know your screen touch has been received
\ No newline at end of file
diff --git a/apps/gipy/app.js b/apps/gipy/app.js
index 69d5e2a94..0a631613b 100644
--- a/apps/gipy/app.js
+++ b/apps/gipy/app.js
@@ -1411,8 +1411,8 @@ function start_gipy(path, maps, interests, heights) {
           value: status.zoomed_in,
           format: (v) => (v ? "In" : "Out"),
           onchange: (v) => {
-            status.reset_images_cache();
             status.zoomed_in = v;
+            status.reset_images_cache();
           },
         },
         /*LANG*/
@@ -1461,6 +1461,8 @@ function start_gipy(path, maps, interests, heights) {
       return;
     }
     if (active && status.heights !== null) {
+      g.clear();
+      g.flip();
       status.screen = (status.screen + 1) % 3;
       status.display();
     }