The only way to select all controls that intersect the selection line is to click in the horizontal ruler.

Question

Quizplus · Accepted Answer

The correct way to select all controls that intersect the selection line is to hold down the Shift key and drag a selection rectangle around the controls. Alternatively, you can use the Edit menu commands to select controls within a specified area. Clicking in the horizontal ruler will not automatically select all controls that intersect the selection line.

The Only Way to Select All Controls That Intersect the Selection