Selecting Drawing Objects
After you create a drawing object, you can modify it (size, colors, etc.), duplicate it, move it, align it with another drawing object and change how it is displayed on the screen.
To modify an element, it is first necessary to select it.
To select an element:
*Position the pointer on the element and click.
*If a drawing object type is already selected, press the <Esc> key, or select the pointer button in the toolbar.
The element is surrounded by small squares called “handles”. These handles allow you to modify dimensions of the element.
 
If the drawing object selected is a line or a link, then small squares or “joints” mark the end of each section (see Handling Lines).
To select several elements at the same time, drag the mouse to enclose the drawing objects in a selection rectangle:
1. Move the mouse holding the button down.
A rectangle appears. One of the angles of this rectangle is where you first pressed the mouse button, and the opposite angle is where the pointer is presently.
2. Release the mouse button.
Note that the drawing objects have to be completely enclosed by the rectangle in order to be selected.
*If you have only partially enclosed a drawing object, it will not be selected. Therefore, a group of drawing objects or a shape whose elements are not close to each other, would not be selected even if it was apparently part of the selection.
Drawing object selection shortcuts 
You can select several drawing objects by holding down the <Shift> key while clicking on each drawing object.
When several drawing objects are selected, you can deselect one or more of them by holding down the <Shift> key and clicking on them.
To select all of the objects in the diagram:
*Press the <Ctrl> and <A> keys simultaneously.