diff --git a/notes/mred/MrEd_100.txt b/notes/mred/MrEd_100.txt
index 4da60af8..528485ee 100644
--- a/notes/mred/MrEd_100.txt
+++ b/notes/mred/MrEd_100.txt
@@ -678,6 +678,7 @@ get-top-level-focus-window
 get-top-level-edit-target-window
 current-new-top-level-window-handler
 get-window-text-extent
+get-panel-background
 
 graphical-read-eval-print-loop