This is a wiki where known shortcuts that are useful in the GFUI can be posted alphabetically.
Arrows/Shift+Arrow - moves a selected object or group of objects, Shift+Arrow moves it in larger jumps
Ctrl Z - Undo one step
Ctrl+Shift+Z- Redo one step
Spacebar - Hold down while clicking and dragging to move the workspace
While Viewing a Trace
Ctrl / - increases or decreases brightness
Ctrl-Shift / - Fill in small details / preserve small details