How do you turn off the hud in Half-Life 2?

To turn off the HUD in Half-Life 2, you can use the console command. First, enable the developer console in the game settings. Once it's activated, press the ~ key to open the console and type cl_drawhud 0, then press Enter. This will disable the HUD, and you can re-enable it by entering cl_drawhud 1 if needed.