Default Key functions

[F2]  Quicksave. Saves the game into the file "save_0.sav". Can also be used to mark a position in level walkthrough mode.
[F3]  Quickload. Loads the last saved game.
[F5]  Video resolution up.
[Shift-F5]   Video resolution down.
[F6]    Takes screenshots to the file "shot_n.jpg".
[F12]  Toggles music and sound.
[Alt-F4]  Shuts down the engine.
[Esc]  Shuts down the engine.
[Alt-Enter]  Toggles window and fullscreen mode.

The following keys are active in the development engine, but not in the distribution engine:

[Tab]   C-Script console. Activates a blinking cursor. C-Script instructions can be entered directly and executed by pressing [Enter]. Some instructions, like sys_exit or level_load can't be entered this way.

[0]   Camera movement. Toggles between script-based movement, direct player movement and direct camera movement, which allows to move the camera with the cursor keys.

[F10]  Single step to the next source line in debug mode.

[F11]  Activates a Statistics Panel (see below) that displays some predefined variables and other information. [F11] pressed a second time causes the level polygon tesselation to be highlighted by red lines, and the bounding boxes of non-passable entities by a blue wireframe.

[Shift-F11] The game freezes and a cursor appears on the screen. When clicking onto an entity, the watched pointer will be set to that entity, causing it's status display to appear on the screen. Pressing [Shift-F11] a second time will resume normal gameplay, but the status display is permanently updated with the status of the last clicked entity, thus allowing to examine it's properties in real time. If you want to get rid of the status display, click an empty position while in frozen mode.

[Ctrl-Alt-End] Shuts down the engine. Useful if you've re-assigned the [Esc] key and forgotten to assign a sys_exit command to a key.

Statistics panel [F11]