When displaying optimal size sometimes scroll bars of the window may be displayed depending on the image size and window size. This patch should fix it, I tested it with many different image sizes. Reproducible: Sometimes
Created attachment 89942 [details] roundzoom.patch
Git commit fb0a55a58d689bb493c2b9540760d72873c79bb3 by Gilles Caulier. Committed on 12/12/2014 at 20:48. Pushed by cgilles into branch 'master'. apply patch #89942 from Maik Qualmann about to Round down zoom when fit to windows size is enable and to prevent to display canvas scroll bars FIXED-IN: 4.6.0 M +2 -1 NEWS M +3 -0 libs/widgets/graphicsview/imagezoomsettings.cpp http://commits.kde.org/digikam/fb0a55a58d689bb493c2b9540760d72873c79bb3