If you want a screen shot, use ALT S. You will find the screen shot in BMP format in your Aces High 2 program folder.
If you want to get rid of the text window, the best you can do is to make it transparent. The window will go away, but you can still see text. Open your clipboard, click on Options, Preferences, then GUI. Move the slider on the Message Window all the way to the right.
Gunner