select the rectangle 1 layer and then select the rectangle tool in the left tool bar 2. in the option bar along the top of the UI, select the path operations drop-down and choose subtract front shape. 3. click anywhere on the thin, white rectangle shape on the left side of the document 4. in the create rectangle dialog box, type 700 px for the height and 700 px for the width. 5. click the checkbox that says from center to ensdure the new shape is created from the center of the rectangle 6. click ok