Actually, I decided to switch theme to JKREATIV, but the issue remains.
Through the (free) PhotoPress – Image Taxonomies plugin, keywords that I have added to photos in a photo editor are now visible in the media library. PhotoPress also provides a gallery plugin for display, but the JKREATIV galleries are much more beautiful, of course. Further, via the plugin “Media Search Enhanced”, images can be searched based on keywords.
It would really be great, if you would provide a possibility for JKREATIV image galleries to be dynamically populated by a keyword search, so that all images with a keyword would be filtered and visible at time of browsing.