Normal Gmod controls except:
E and R - Scroll Wheel
F - Toolgun
Q - Spawn Prop (not prop menu)
Toolgun Controls:
R - Physgun
F - Scale Tool (lmb and rmb to change size)
E - Nocollide Tool (lmb and rmb to nocollide and collide respectively)
Shift - Remover Tool (lmb to remove props)