Esspecially to compare and check the quality of different images it makes sense to view not to a certain % value, but to a certain dpi (resolution) value. This makes it easier to distinguish, if an image can be printed at a certain size.
What I need, is the display of images at a certain output size. Right now you can select the zoom, this means larger images are bigger than smaller images.
What I need is a variable zoom for different image sizes.
For example if I want to print to A3 I need to go through all the images and check them sized to a certain fixed width/height. If images are too small, I can then see how they loose resolution.
It would be also great for the compare tool - right now it is difficult to compare 2 images which show same picture but have different resolution. With my suggestion they would be both scaled to the same width/height and so the picture parts would show synchronized.