#1370 save crop frame in preview

[jojoko825]

I regularly scan multi page documents with non-standard size (e. g. booklets with e. g. 5 x 10 cm). I am missing the option that I fix a frame for cropping of the first page and this is saved for the following scans. Now I have to adjust the cropping frame for each page individually and as the size of the frame is not shown they will all differ a little bit at the end. Have I overlooked a special setting? If not I would be thankful for such an option. Thank you very much.