A:Answer Hi Frances, To switch the aspect ratio, please go to the menu of the DVD and then select SCREEN SETUP then go to TV TYPE. Under TV TYPE you can choose between 16:9, 4:3 LETTERBOX, and
4:3 PAN SCAN. Ref: https://www.sony.com/electronics/support/res/manuals/4447/d1526642f56f7d2c942c4598ea9add71/44474743M.pdf (page 1) -Sam