Browse large images with zoom

[Arykelton]

When the image is zoomed, I cannot navigate through it to see the details, the drag function is activated

[jnweiger]

Tested with files_mediaviewer 1.0.4 on firefox, chrome, safari, IE11, Edge

A zoomed image can only be "dragged" sideways. The image overlaps with its neighbours when zoomed in too much:

Dragging a zoomed view of the field with blue stripes to the left, makes the right neighbour (catus with sticker) appear ontop:

I could not find any navigation to move up and down at all.
As left and right swipe is used for navigation, it should be made clear to the end user how to drag around within one image.

Expected behaviour: click & drag should pan the image, not swipe through the list, when zoomed. Images can be inspected without overlaps.

Workaround: rotate 90°, then you can inspect details at the top or bottom center by dragging left/right 🙈