Modelling
General
V → Select
T → Measure
Q → Rotate
M → Move/copy
Shift + C → Comment
Ctrl/Command + C → Copy
Ctrl/Command + V → Paste
Ctrl/Command + Shift + V → Paste in place
Ctrl/Command + G → Group
Shift + Ctrl/Command + G → Ungroup
Design
R → Rectangle
C → Circle
L → Line
A → Arc
P → Push/pull
Sketch tools
O → Offset
F → Fillet
X → Trim/extend
Shift + A → Align
Boards
V → Select
H → Hand tool (pan)
S → Sheet
R → Rectangle
C → Ellipse
L → Line
T → Text
Shift + T → Dynamic Text
Shift + L → Pencil
Shift + C → Comment
Ctrl/Command + C → copy
Ctrl/Command + V → paste
Ctrl/Command + G → group
Shift + Ctrl/Command + G → ungroup