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To create the box, now move the cursor to a position that will act as the opposite corner
of the box (meaning the opposite corner along a diagonal of the box). Let's use a position as
near the point (2, -1) as possible. Notice how the box changes shape as the cursor moves. Press
ENTER to set this position once the cursor is in place. The calculator will then automatically
adjust the WINDOW settings so that the box we drew becomes our new viewing rectangle. Press
CLEAR to clear the cursor and coordinates from the screen.
 ...  ... Move the cursor to (2, -1)
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