I would find it very helpful if it were possible to display the file name of the image in the image viewer. Currently, to know what file one is viewing, one looks at the sidebar with the list of images. But often one hides the sidebar. Even with the sidebar showing, if one has selected multiple images from the list, one can’t tell which of the images one is viewing. (This will be a bigger problem if, as I hope, you change the selection function so that one can save a list of checked images as one views them.)