Toggle object / edit mode
tab
Mode pie menu
ctrl + tab
Delete
X
Add object
shift + A
Adjust last operation
F9
Move
G
Rotate
R
Scale
S
Transform along axis
while transforming
X / Y / Z
Transform along local axis
while transforming
X, X / Y, Y / Z, Z
Transform along plane
while transforming
shift + X / Y / Z
Clear location
alt + G
Clear rotation
alt + R
Clear scale
alt + S
Apply transform
ctrl + A
Trackball rotate
R, R
Precise movement
while transforming
hold shift
Incremental movement / snapping
while transforming
hold ctrl
Duplicate
shift + D
Duplicate linked
alt + D
Repeat last action
shift + R
Join Objects
ctrl + J
Select Object
lmb
Select multiple objects
shift + lmb