Hi i found a shortcode widget in footer1, it is [vu_gallery_widget images="1901,1901,1901,1901,1901,1901"]

how do i change the images(thery are by default the empty image)

and how this short code widge is created, and how do i use or edit them.

thanks

Thanks, by the way, how can i create my own this kind of short-code widget, can provide an example and links to any learning resource