If I change an image style, how can I force BackdropCMS to rebuild all of the images in the user interface?
I know that if I delete an image style folder in the files directory that will force all images to be rebuilt. How can I do this without having to delete files in the files directory?
If you install the Image Effects module and also enable the Image Styles Admin submodule then you get a 'flush' action. It doesn't force a rebuild but it enables a rebuild to happen as the pages are accessed.