In first person possessed mode, you have:
toggle sniper mode: ins
pick lock/disarm/jailbreak: 0 (on numpad)
fire: spacebar
creep: R ctrl
run: R shift
possessed melee select: 1
possessed spell select 1: 2
possessed spell select 2: 3
possessed spell select 3: 4
possessed primary ability: 5
possessed secondary ability: 6
possessed group select: 7
remove from group: CTRL-G
To possess a creature, click the possess creature spell in the spells panel and then click on it.
To form a group, press 7, use mouse look to highlight the creature to join your group, then click when they are highlighted.
