Comment 11 for bug 25619

Completely agree with Ben Bucksch. As he already stated, this app is primarily a viewer rather than an editor, and if it's going to make any permanent changes to an image file they at all, they should certainly be implemented in a completely non-destructive manner. IMHO, this only reinforces the logic behind my previous proposal as well, as this would accomplish what Ben desires without any retooling required aside from pointing image files to gThumb as the default rather than eog. It is for these very reasons that I change the default image viewer on my own machines to gThumb immediately after a fresh install, so as to avoid the aforementioned frustration caused by the absence of save dialogs in eog, as well as the choice in quality settings presented by gThumb after choosing to save the rotated image file.

Again, just my two cents.