Keep aspect ratio on viewer window

[igorer88]

The viewer window changes as the pages sizes.

So sometimes the window gets out of scope when the image is bigger than the screen resolution. It's annoying to move the screen when the next image is bigger.

Is it possible to set a fixed size? So the image scale the aspect ratio to it.

Actually as the web version address this problem, but it would be nice to have it addressed on the native version too.

Thanks!