Toolbar Config
From Space Engineers Wiki
Toolbar config is a screen, where player can manage Toolbar to equip blocks and tools and create new blocks to build.
Usage
Press "G" to open Toolbar Config.
Drag an icon to toolbar slot at the bottom of the screen.
Select "Creative mode" to change game mode to Creative Mode.
Active "New Small Ship", "New Large Ship" or "New Station" to create base building block.