General (works in both Layout and Design Editor)
Tab – Toggles right panel open and closed
Shift+Tab – Switches from Layout Editor to Design Editor and vice versa
CTRL/CMD+S – Save
CTRL/CMD+D – Activate design Editor
CTRL/CMD+G – Activate Layout Editor
CTRL+L – Activate Layout selector
Layout Editor Only
Arrows – To move blocks in 1px increments
Shift + Arrows – Moves blocks quicker (in 5px increments)