Direct the program to show us thumbnails of all of the images of a specific folder so we could just check the images we want to use

As is, if one does not know they can load more then one image by pressing ctrl, they will have to select each image separately and tell the program to load it, then do the process over again. If instead we could see the thumbnails of the folder and clicking on it selects it (clicking again deslects) would make it easier to use.