If you try the excellent image viewer Faststone Image Viewer and watch
a jpg picture in full screen mode you can touch the right border of the
screen and see the exif data, and view and edit the jpeg comments.
http://www.faststone.org/
In fullscreen mode, touch the other screen borders for thumbnails,
editing tools and a main tool bar.
Doubleclick on a picture to change back and forth between full screen
and the main program.
Choose the regular version ot the new beta version on
http://www.faststone.org/FSViewerDetail.htm
The new beta allows drag-n-drop into folders.
Negative maybe is that multiple selection is like on a page with icons,
not in sort order.
Shift-click selects a box of thumbnails, between the earlier selected
and the shiftclick selected, then you can drag-n-drop them all into
another folder.
I takes some getting used to, and I think the author will fix this
soon.
It should select sequentially between the first to the last in the
chosen sort order.
Apart from that the new beta works very well.