STEPS TO REPRODUCE 1. Add 2 or more images as metadata EXPECTED RESULT Multiple images can be Cover art, front cover ,back cover, single cover there is no option to label/change it. SOFTWARE/OS VERSIONS Windows: 10
In the dialog which gets opened when you edit a cover art frame (double clicking on the picture, or selecting "Picture" after clicking the "Add" button, or clicking "Edit" when on a "Picture" frame), you have a combo box "Picture Type" where you can select the picture type (e.g. "Cover (front)", "Cover (back)", "Leaflet page", ...).
(In reply to Urs Fleisch from comment #1) It is only possible to do that when there is only 1 image added.
(In reply to Urs Fleisch from comment #1) Ignore it