Simply press delete or insert in game to reset the camera view. This does not require any triggering or any other actions, its already in wc3.
But if you insist in using a trigger for it, there is action in the triggers "reset camera view for player X".
Waldbaer
#3
And if you want to zoom farer away than in the standard game view, make a camerasetup for it and make a trigger action "apply camerasetup". If you then scroll, it will still keep the non-standard view.
The Mouse Scroller thing to change the tilt angle will also reset it.
Waldbaer
#5
Yes, the only way to keep it from doing that is a periodic event trigger which sets the camera fields distance, angle, and maybe field of view to the values of your camerasetup, as far as I know.