Those charts were originally created by Blade long time ago (during times where you would use overlays and put them on your keyboard). I edited them a bit and put them on a single image.

Here's the contents from the original README.TXT file that came with those:

Quick Reference Charts by ->BLADE<-

I made these game overlays for one reason:

I needed them. The game manufacturers seem to have a pact with these
small companies that profit by making overlays for about $10 a piece. I
think it is completely irresponsible for these extremely complicated sims
to be released to the public without an easy-to-read, quick reference sheet
included (especially because it would cost only pennies to make in mass
production).

INSTRUCTIONS:
Simply cut out the three sections labeled "cut out" with a razor blade or
whatever and lay it over the F keys. I know that some keyboards (like mine)
have very little space between the tops of the # keys and the F keys. I
find it still works great. IMPORTANT: Verify that the small, overlay template
is 11" wide at the printer to achieve a good fit on the keyboard.

The small "A", "C", and "S" letters to the left of some keys represent
"Alt", "Ctrl", and "Shift" keys.

I ask ONLY $2 from anyone who finds these as useful as I do. Any ideas or
suggestions are encouraged. My mailing address is 146 West Street
Simsbury, CT 06070. I hope this makes the wonderful world of flight sims
a whole lot better.

Feel free to e-mail me any suggestions or comments.

Watch your six!
Scott (Blade) Gentile
71574,1616.