It can be very useful to be able to regenerate all image sizes through Mag Manager. If properly executed, it could be much faster than the CLI command that does it frame by frame.
May 20, 2019
Adding image via our software you can right away set resize rule for it Also this can be done during import on the fly
If you have idea how to implement regenerate image size option in another way, please share more details so we could understand how you want it to look like and work.