Before any property changes can be applied to an object, it must first be selected.
Selected objects are shown with Handles on the corners and sides. Objects are selected by clicking on them with the mouse.
Selecting Multiple Objects
You can select more than one object by dragging the mouse with the Arrow button depressed. To drag the mouse, hold the left mouse button down and move the mouse. Then let the mouse button up.
Dragging the mouse this way across the drawing window draws a temporary dotted rectangle. Any objects completely enclosed by this rectangle are selected once the mouse button is released. Holding the Shift key down while dragging adds the enclosed objects to any existing selection.