Image name

Tick Table II-H7: User name Uploading users may overrule the default name. on the Photo ALbums -> Settings admin page.

Tell me please! What is the shortcode for the lightbox for thumbnails?

Lightbox on thumbnails is a link type in Table VI-B2

Only through the table setting? No shortcode?

An inline setting can be done:

[wppa_set name="wppa_thumb_linktype" value="lightbox"][wppa type="thumbs" album="..."][wppa_set]

If you are not yet familiar with inline settings read https://wppa.nl/docs-by-subject/in-line-settings/

Thank! You are the best!