Crouch

Open inventory

Toggle flashlight

Go prone. When prone, return to your previous stance

Switch between fire modes

Throw grenades

Inspect your weapon and look for your firing mode

Lower your helmet visor

Toggle laser sight

Hold Shift while zoomed in with right click to hold breath and steady aim

Sprint (make sure Hold to Sprint/hold breath setting in Settings > Controls is enabled)

Mumble, if AI is nearby, they will respond to you with a voice line

See the remaining time of the raid and get a feel for if it is still worth to check on the early objectives

Blind fire to your left

Do a slow left lean

Do a slow right lean

Fold / unfold your stock

Look into the chamber to see if there is a bullet

Take out the mag and estimate the remaining ammo

Lean right

Blind fire above you

Lean left

You can drag and drop items from your tactical rig or pockets onto your quick access bar (keys 1 through 0), this also applies to grenades

Select a grenade from your quick access bar (keys 1 through 0) to take it into hands to be able to time your throw

Instantly go to minimum speed. Press again to return to your previous speed

Switch between stacked sights / scopes

Switch reticles in your red dot sight

Quick reload. This will toss mag on the ground for a quicker reload. Do not forget to pick up your mag afterwards

Quick melee attack while holding a firearm

Selective reload

Move through your stance from standing to crouching to prone