MOUSE: Move the mouse in the direction you want to shoot (aim) and click on the left button to shoot. One click - one shot. In machine gun mode, holding down the mouse button will result in continuous shots at the appropriate fire rate of the weapon.
TO LOOK AROUND: When in basic camera view (default), the camera will look towards where the mouse or gun is pointing.
PANIC BUTTON: When riding in tanks with a turret, use the right mouse button to line up the tank hull to the direction that the gun is pointing
Please note: On tanks, the tank turret will turn at the (transverse) speed of the specific tank which is always slower than the mouse. The pointer moves in real time, but you must wait until the turret catches up before shooting. Point to the target (green circle), wait for the turret pointer to catch up (smaller green circle) and shoot.