In addition to the handles for stretching a figure, shapes also have handles in the upper left, upper right, lower left and lower right for resizing the figure. The screenshot below shows these handles for a rounded rectangle:
To Resize a Figure, perform a Click/Drag combination on one of the above shown handles. The width and height of a figure will change dynamically as the handle is dragged.
Pressing the Shift Key while resizing a figure allows it’s current aspect ratio to be maintained.
Multiple figures can be resized at once by placing them into a group.