Unfortunately there isn’t a wiki for the C4 engine any more which describes the functions in the editor.
But you can use the wiki of the Tombstone engine. Tombstone is an advanced version of the C4 engine and uses over 90% of the same editor functions.
Tombstone Wiki:
tombstoneengine.com/wiki/index.php?title=Main_Page
Editor Wiki:
http://tombstoneengine.com/wiki/index.php?title=World_Editor
The remaining, not documented functions, have been created by us or are Tombstone specific.
After starting the game you can open the editor via the console with the key “ ^ “. There is a button in the bottom left corner with which you can open the editor.
By the way: when you enter the command “ cmd “ in the console, you get a list of the possible console commands.
But you can use the wiki of the Tombstone engine. Tombstone is an advanced version of the C4 engine and uses over 90% of the same editor functions.
Tombstone Wiki:
tombstoneengine.com/wiki/index.php?title=Main_Page
Editor Wiki:
http://tombstoneengine.com/wiki/index.php?title=World_Editor
The remaining, not documented functions, have been created by us or are Tombstone specific.
After starting the game you can open the editor via the console with the key “ ^ “. There is a button in the bottom left corner with which you can open the editor.
By the way: when you enter the command “ cmd “ in the console, you get a list of the possible console commands.