gioyfa on "[Plugin: FancyBox for WordPress] Resize to fit, only in mobile"

Is there a way, to Resize to Fit, only in mobile viewing? I suppose it could be easy, if somehow the option in Behaviour's tab, would be in the code only if the screen is under some resolution.

Is it possible something like tha?!
Thanks

https://wordpress.org/plugins/fancybox-for-wordpress/