Images with assigned tags or rating (stars) may be grouped together and show up front in the main image window. Images are first grouped by stars, and then by tags.
To turn grouping on and off press toolbar button:
.
By default images are grouped by folders. To present images in a flat list depress grouping by folder button:
. Flat list may be useful when one tries to sort images. With folder grouping sorting works independently in each group, without it it's global.