Image previews dimensions

Hello,

Thanks a lot for your plug-in, it really saved my ass !

I would like to customize the dimensions of the thumbnails (200px x 200px)
I tried with CSS of some elements, but I think it’s not the right way…

Is there a way to achieve this ?

thanks,
thomas

https://www.ads-software.com/plugins/gravity-forms-advanced-file-uploader/