Use the sizing handles to resize an object. When the mouse pointer is positioned on a sizing handle, it changes shape to indicate the direction in which the object will be resized. Active sizing handles are solid; if a sizing handle is hollow, the object cannot be resized along that axis.
For information on sizing multiple objects, see “Resizing Objects”.
When you change the size of an object, its final shape may be affected by whether you have Snap to Grid turned on.