For many editing operations, such as moving, copying, and deleting, you must select an object. Clicking an unselected object or clicking an open area deselects everything currently selected. You cannot select a front panel object and a block diagram object at the same time.
Complete the following steps to select an object.
You also can create a selection rectangle around the object(s).
Complete the following steps to create a selection rectangle.
Press the <Shift> key and click objects to select additional objects or deselect an object.
If automatic tool selection is enabled, you must deselect the object the cursor is over to switch from the Positioning tool to another tool.