Resize Thumbnails

[rita]

Hej, if I enlarge the thumbnails (Ansicht -> Miniaturbildgrösse -> adapt to your desired size) they get blurry. I then try to "Reload thumbnails" (Ansicht -> Miniaturbilder neu erstellen) in order to enhance data, but this doesn't work. F5 doesn't work either. What am I doing wrong? I am very grateful for any hint. Thank you!

[xnview]

Please check the thumbnail size in catalog Settings>Catalog - Width/Height, and rebuild thumbnails