Currently, as far as I know there is no way to turn off un-docked panels from "not" displaying when pressing the tab key in ArtRage Preferences. Only docked panels disappear when the user presses the tab-key.

Two extra things...

1. If you agree with this post (or any other posts in the suggestion's forum) then please post a quick reply by just saying +1. If you disagree let us know why. How can the ArtRage team know how important these suggestions are to fix/enhance if we never speak up! Myself included.

2. Is Hannah on vacation? It has been over a week since she posted on the forums.