ShortCut Diagram - Need Clarification

Opus 12.24 short Cuts.
Shift+p = Pin/Unpin topic. Very easy to figure out.
g,h = Home (Shift, Control, Alt) not sure on the action.
I downloaded the Short Cut diagram. Is there a descriptive file that goes with it?


Those are the forum's keyboard shortcuts. They don't do anything in Opus itself.