cl_showHUD command

cl_showHUD 0 or 1
Command effect
This command disables or enables the head-up display (HUD).
0 Disable HUD
1 Enable HUD
cl_showHUD 1

How to enter a cheat code

Cheat codes are entered in the console. Open the console by pressing the § / ~ / ` key, which is usually located in the upper-left corner of the keyboard. Enter the cheat code and press the Enter key.

This cheat is only available after you add -devmode to the "SET LAUNCH OPTIONS..." section in the Steam properties of the game.