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| Click (in toolbox) and Click in level | Place object in level (hold CTRL to place multiple copies) | 
| Click and Drag | In empty space: select objects in selection box. On object: move object around the level. | 
| ESC | Clear selection (select nothing) | 
| DELETE | Delete selected objects from level | 
| Arrow Keys | Move selected object(s) 10 pixels. | 
| CTRL + Arrow Keys | Move selected object(s) 1 pixel. | 
| SHIFT + Arrow Keys | Resize selected object(s) 10 pixels at a time (if CTRL is pressed, 1 pixel at a time) |