Keyboard Shortcuts
Metadata can be edited using keyboard shortcuts:
Add (Insert): CTRL + I
adding a new Layer
Edit: CTRL + E
start editing
Save: CTRL + S
save your edits
Paging: ALT + arrow left / arrow right
open the next or the previous item
On Apple devices use Apple Key instead of CTRL.
In Safari use the Option Tab to tab to the calendar icon and open it with Enter or tab to the add buttons.