Suggestion for "seen" page

On the “seen” page for titles and actors such as https://www.imdb.com/seen/tt0821359/ there is a button to “hide titles I’ve seen.” It would be useful to have a button to do the opposite, that is, show only what HAS been seen from the list. I often come to IMDb to see where I’ve seen an actor before, and this button would really help.  

(For anyone reading this who doesn't know, if you go to the URL of an actor or title, etc. and replace the word "name" or "title" with "seen" you can mark which items you've seen.)