How do I use mortars?

To use the mortars, first zoom in using the Mortar Zoom button. This will zoom in as if you were using the spyglass with the addition of a target circle. Move the target with the right thumb stick and, when you are satisfied with your target, press Fire to shoot. The target circle will turn red when an opponent is within range.

Buttons

Mortar Zoom

• Wii U: L
• PS3: L2
• PS4: L1
• Xbox: Left bumper
• PC: Q (hold)

Fire

• Wii U: ZR
• PS3: R1
• PS4: R2
• Xbox: Right trigger
• PC: LMB

On PS3 default settings (as I have not changed anything) it is L2 to aim since L1 is for round shots, and R1 to fire while you are looking in the mortar scope.