A list in the left-hand part of the Objects window.
If you select one or more objects in this list, the possible actions that you can perform with the selected objects will appear in the Dynamic menu.
To select one object (and deselect all the others), click on the object.
To extend the selection, drag the mouse or use Shift-click.
To change the selection of one object (without changing the others), use Command-click.
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