In AGOL it tells you to use 600x400 for a logo but I cannot find a number for 123. This size seems ok so far but I just found that AGOL is not consistent so I wanted to check.
Everything in AGOL is
Except groups are 400x400 for some reason.
Makes it hard on the graphics person. Thanks
@DougBrowning, I've run into this a bunch of times publishing through Survey123 Connect. Using a square (or any odd-sized) image for the Survey123 icon renders it stretched or distorted once it's published and viewed through ArcGIS Online or through folks' phones/tablets.
I did a little testing and found that you need the image to have an aspect ratio of 1.5:1 for the Width:Length to not have the Survey123 Form thumbnail get stretched or distorted.
If my source image isn't in that aspect ratio, I use the Change canvas size... found under the Image menu (or a Shift+V) in the freeware IrfanView to add pixels to either the image width or height to get it into aspect ratio 1.5:1.
Then the Survey123 form thumbnail doesn't get distorted when it goes from Survey123 Connect to AGOL and on to phones/tablets.