diff --git a/Doc/ide_debug_memory.html b/Doc/ide_debug_memory.html
index 6ac0f8c3..6095b689 100644
--- a/Doc/ide_debug_memory.html
+++ b/Doc/ide_debug_memory.html
@@ -16,6 +16,12 @@
Debug Memory
Values that changed during the last step are marked red.
+ Clicking on the display-as-text button (left most) will switch to character display. Clicking again switches to lower case mode.
+
+ Clicking on the display-as-charset button (second left) will switch to characterset display. Clicking again switches between hires, multicolor and ECM mode. The used colors can be changed via right-click context menu.
+
+ Clicking on the display-as-sprite button (third) will switch to sprite display. Clicking again switches between hires and multicolor mode. The used colors can be changed via right-click context menu.
+