Morning Chris,
Yes sorry for the lack of explanation relating to "F2 mode", as default on single monitor it opens as described, which you could come in and out of by pressing F2 and use that functionality to test services, which worked fine until upgrading to 2.6.42
Now what happens is when you press F2 to exit the single monitor mode all it does is flip between a black screen with the windows task bar showing and the presentation interface when you press F2. Before when pressing F2 to exit the single monitor mode, you were prompted, did you want to exit that function or use the function accordingly, that has disappeared.
Now when wanting to go between applications with ALT+TAB, this is only possible when the black screen is showing and not when the presentation interface is showing.
I've noticed this morning that if F2 isn't pressed to exit single monitor mode then ALT+TAB works to switch between applications. Thats with me automatically pressing F2 when Zionworx opens. So at present its workable as long i rememeber not to press F2 upon opening.
Re-reading your reply it looks as if it is working OK, with respect to the presentation screen behind, is this a new feature from the previous version?
The ALT+TAB part only works when the presentation screen is behind once F2 has initially been pressed to toggle between on top and behind, before that it works ok.
I've linked to some screen shots to show, hopefully,
Initial opening of Zionworx ->
Black screen if pressed F2 ->
Hope this helps
Mark