Limit photo size

I’m working on building an auto image slider with a variable on images ranging from 1-5 with the little dots at the bottom that indicates what number of what this photo is. Current photo size in editor is 375w x 85h. Only one user is allowed to edit and upload new photos to this “ad banner” the rest get to view it and click on it and view its specifics and links (if any) with this being said, can Adalo reject a photo that’s being uploaded for this “ad banner” if it does not fit in the banner size of 375w x 85h?