Updated keyboard shortcuts and usability improvements.
C2 and CC, I'm pretty sure showed the Keyboard shortcuts in the tooltips.
I don't know why the shortcuts were made hidden in C3!
There's so many secret shortcuts that improve life, but no one knows about them!
I only just discovered that the best way to preview the game is to press F4, after many years of using this software.
FWIW, all keyboard shortcuts are listed in the manual.