This class of commands affects different displays on the heads up display. Many of these settings can also be changed in the menus.

/toggle cg_drawcompass
Toggles the compass on or off.

/toggle cg_draw2d
Turns the entire Heads Up Display either on or off.

/toggle cg_drawfps
Either shows or hides your frame-per-second in the upper right-hand corner.

/cg_FOV
Changes your field of view. Higher values give you a "fishbowl" effect that some players like, as it gives them better periferal vision.

/toggle cg_drawtimer
Shows the amount of time left on the level. Not too useful, since there's a clock on the screen by default.

/toggle cg_gibs
Toggles whether or not gibs are drawn when someone is hit particularly hard.

/toggle cg_drawteamoverlay
Draws or hides the team overlay information that shows health and location of all your teammates.