Checklist for marking items as watched or to delete

Not sure if i’m putting this in the right place but a way to check a bunch of items at once and then mark them as watched or delete them would be incredible. I often wipe my Windows install and every time I do, I have to re-mark every single thing as watched 1 by 1

The point of a software like Plex is that it makes this automatically for you.
You could backup all Plex data before you wipe your system.
(Why are you doing that so often? It’s not that we have Windows '95 anymore. I didn’t need to re-setup my system in years.)

There is a second alley available.
Export your library(s) into a CSV file with Plex2CSV
In the higher export detail levels, there is a column ‘View Count’. If it contains a number, the item is ‘watched’.

You can mark multiple things are watched. Use the multi-select to choose the items, them hit Mark as Watched on the left. Or if you have something that was watched or partially watched, mark them as unwatched, then mark as watched. You can’t do that with delete. I don’t think being able to mass delete something from the UI is a good idea. This is better done at the file management level, then you can just update Plex to see the items removed.

Early 2021 clean-up: implemented