Many of the Constrain, Construct, and Calculate tools require that you select more than one object.
To select more than one object:
| • | Click the selection arrow  on the tool bar. |
| • | Hold down the CTRL or SHIFT key as you click the objects you want to select. |
If you click the wrong object while holding down the CTRL key, click it again and it will become unselected.
If all of the objects you wish to select fall within a rectangular region, you can use the selection box:
| • | Click on the selection arrow  on the tool bar or the Drawing toolbox. |
| • | Draw a rectangle around all of the objects by clicking and dragging. |