E	Starts the Edit Selection Mode to move, resize, flip and/or rotate the highlighted or selected elements.
LMB	Click to select or deselect. Hold and drag to make a rectangular selection. While making a rectangular selection you can hold Shift to change the additive behavior.
RMB	Click once on an element or selection of elements to edit properties. Hold and drag to move the element or selection around. While dragging you can hold Shift to change the Snap-To-Grid behavior, and/or hold Control to change the Snap-To-Geometry behavior.