Crosshair
From ZDoom Wiki
The crosshair or crosshairs is a small graphics displayed as part of the HUD in the center of the screen and serving as a targeting aid.
ZDoom provides a selection of crosshairs, which can be configured through the HUD options menu. Additional crosshairs can be given through a custom XHAIRS lump. Weapons can feature their own built-in crosshairs with the A_SetCrosshair function
