I am trying to set up a profile picture on Webex. However, no matter what I do it seems part of my face is cut off and whatever I do I cannot resize the image. I have tried saving the image again with different dimensions (I've tried 420 x 594, 72 x 102, and 51 x 72). If I log into the webex website I can get the slider bar, but it only gives me the option to zoom in (rather than out). On the app it doesn't even appear. Any idea how I can solve this?