Panel image minimal width

[Svnt]

It seems you have to create your own field with validations to achieve that.

Can you require a minimum image size in the panel?

I have several templates that contain a large cover image and then several side images. I would like set a minimum size or the cover image (something like 1500 x 600) and a minimum size for the side image ( maybe width of 500). I don’t see any way of doing this in the panel. Is there a solution that I have missed?