Fix Corners - Select Rectangle

Look at the photo below, you can see a dotted line rectangle around the license plate, within the "white" section.  I did this by positioning the mouse in the upper right corner, then holding the left mouse button down, and then "dragging" the outline until it is adjusted they way I wanted.  If you let go the outline, and you wantto position it differently, you must click on the "Rectangle Select" button on the "Tools" bar again first.  You must remember this.