diff --git a/USAGE.md b/USAGE.md
index df2f100..4af3f19 100644
--- a/USAGE.md
+++ b/USAGE.md
@@ -442,3 +442,6 @@ menu option File → Interface Simulation to load.
 
 - There is no facility to give channels custom names (needs kernel
   support to save this information in the interface).
+
+- No keyboard accelerators (e.g. Ctrl-Q to quit) have been
+  implemented.