Key Bindings are the keyboard and mouse and other a given action in the game. The following is a list of defaults.
Key Bindings List
These commands are for a standard QWERTY Keyboard layout with the standard download. Steam users may find a few differences. The screenshot key will place a picture of the game, including the GUI, to the "screenshots" folder: "%appdata%/Space Engineers/Screenshots" for all users. To hide the interface, press Tab before taking the shot.
* - Key changes function depending on whether player is in cockpit.