In this post i'll guide you through the steps you have to take if you want to edit the css file in AutoHotkey.chm.
This is what my chm looks like:
And here's the css file i used:
This is how you do it:
1. Make a backup of AutoHotkey.chm, you never know..
3. Run KeyTools, Toolsmenu>Decompile
4. Decompile AutoHotkey.chm
5. Locate, edit or replace: default.css
6. Run HTML Help Workshop (I think it comes with windows, otherwise google)
7. File>Open .hhp File