WASD + Arrow Keys
By default Grid Scale is 32 and X and Y offsets are set to 16. This matches up with Flowlab's Grid perfectly.
Red square is where you can move the mouse before the object is moved.
The Green Square is how far you can move the offset
W and S changes the Grid / Movement Size
Left and Right Arrow Keys moves the X offset
Up and Down Arrow Keys moves the Y offset
Backspace to reset