Adds the specified entity or entities to a list that shows debug text above them in-game. This helps developers and mapmakers debug and test game features visually.
Clears the list of entities that currently display debug text above them. This helps developers and map makers reset which entities show debugging info.
Turns on or off the wireframe of an entity's interpolated vcollide model. This helps debug collision detection and understand how collisions are calculated. Requires a cheat-enabled server.