document title in the breadcrumb should be a link to the default view of the document
Standard size of the shown image should be height, not width
unneeded buttons in view mode should be grayed out
Menue Bar
At the very left:
** the i Button
Image / LinebyLine /SidebySide/ Text: put them to the left
Forward, and page number etc.: Make it much smaller and put it exactly in the centre; put zoom in out and centre besides
Add: adjust to height, adjust to width and use much smaller buttons
On the right hand side:
“Edit” button, Save changes button, Page status