|Click| blocks to select them and |Drag| to move them |B| to create a new block |D| to delete the selected block |Space| to start a connection while highlighting an in/output, and |Space| again to finalise it To delete a connection, connect it again |Click| on the entries on the left to toggle them |+| and |-| to add/remove entries |E| to create an export code, and |I| to import from a code or from one of the presets |S| to change the grid's size Hold |R| to destroy all blocks and connections