Hi gregvpruitt,
In answer to the second question, demur and I are working on functionality that will be released in the near term that will support regenerating thumbnails as well as viewing generated thumbnails in a single location.
For the second part, there is not currently functionality to resize the thumbnails being generated, but that is not scheduled for development in the near term, unfortunately.
-Dan
Hi gregvpruitt,
Both of the options you described are now available 🙂
If you go to Dashboard -> Settings -> Document Gallery, the changing sizes option is in the General tab and the Thumbnail Management has the thumbnail deletion functionality (after deleting, the thumbnail will be regenerated next time a gallery including the attachment is deleted.
-Dan