The /cdebug command allows you to toggle different debug overlays (debug screens).

/cdebug [<type>]

The available options for the type:

• overlay: Toggles the main debug screen (same as typing /cdebug without arguments).
• fps: Toggles the FPS charts to display the last 240 frames of gameplay.
• network: Toggles the network charts to display information about network traffic.
• profiler: Toggles the profiler chart to display profiling information.