diff --git a/templates/impress.cs/js/slide-drawing.js b/templates/impress.cs/js/slide-drawing.js
index 99f0509813cd5ef531c374223dfd94c3e3cfb293..fc0aa214632dc8c80985e63346a52d65cca4c834 100644
--- a/templates/impress.cs/js/slide-drawing.js
+++ b/templates/impress.cs/js/slide-drawing.js
@@ -97,6 +97,9 @@ function slide_drawing_init(paneId) {
         switch (e.key) {
             case "ArrowLeft":
             case "ArrowRight":
+            case "PageUp":
+            case "PageDown":
+            case " ":
             case "c":
                 lowerCanvas();
                 canvas.clear();