Cropping & small images & large ones

[whismerhill]

I don't completely understand how this piece of software works

http://prntscr.com/fmxwej
if "enlarge small images to screen size" is unchecked
then Aspect Ratio is greyed out, this is weird ! large images might need cropping too !

[gpb]

Hello,
probably it's bug, I will check it. Anyway you can simply leave it checked and if you have small images limit the amount of enlargement.