Why does WAVE tell me `You may not edit annotations ...'?

Since WAVE is often used to view annotated data, without necessarily editing annotations, annotation editing is disabled when WAVE starts. If you have inadvertently done something (such as clicking the middle mouse button in the signal window) that WAVE interprets as an editing command, it will warn you that the editing action is disabled.

If you did intend to edit the annotations, select Allow editing from the menu, then repeat the edit.