I prefer to use hard-copy maps (thank you 1ijac) rather than those accessed in the game with Clipboard Maps. Instead, since I fly different aircraft and forget best altitude, best speed, and how my current aircraft compares to others I might meet in the air, I made aircraft performance charts that can be accessed with Clipboard Maps. I just ran the HTC Plane Performace function, made screen grabs, copied and converted to bitmap for the Clipboard Map function, added the files to the Maps folder, then installed them in the game using Clipboard Maps. The bitmaps need to be 512x512, 8-bits per channel RGB.
Probably other useful data that could be accessed by Clipboard Maps -- maybe a photo of your girl back home to inspire the quest for victory!