These are used for basic movement, most of these can be changed from the menu. Some codes are exclusive to one Source port, such as the gl codes (controlling OpenGL) existing for only GLQuake. NOTE: All commands are case-insensitive and without quotations. This way you can activate the console from the desired input key. The quicker way is by pressing the respective key located below the ESC key, if such key is not present or not working, its possible to workaround this by going over to the console from the options menu and inputing the following command: bind toggleconsole.
Bringing up the console is simple and there are two ways for making use of it, the most simple although recommended way being going into the options menu and selecting the 'goto console' option. In order to make use of these commands it's necessary to bring up the console first, most of the commands can only be used when the game is already started. Using the console is a requisite in order to use cheats. Console Commands are a alternative form of altering options of the game such as respective input keys and commands by using the Console, some settings can only be altered from there.