I can't find in PP for Mac how to do something that is easy in PP for Windows. Can you help me? When you insert a photo for a background, there is a box to check off if you want the photo to retain its aspect ratio when it is added. If you don't check the box, a portrait photo widens to fill the landscape slide and huge distortion occurs. I can't find a way to do this in PP for Mac!! Help, pls! Thanks.