Hotkeys work when you are not typing in the script or hint. If you are focused inside text, hold Alt while pressing the key.
? Toggle this help
A Toggle auto scroll
Space Pause or resume auto scroll
Arrow Up/Down Nudge scroll
Page Up/Down Big nudge scroll
Home / End Top / bottom
+ Text size up
- Text size down
[ / ] Tighten or loosen window
M Mirror (X)
F Focus line
G Fade
1 One line mode
T Theme toggle