Here's a video explaining the new functionality:
https://www.youtube.com/watch?v=6M6jNlairGc
Basically all the documents you read can have tags. So you can manage all your documents via whatever tag you want.
You can then read those documents in Polar directly and highlight parts of text that are interesting.
These highlights, notes, comments, and flashcards that you create can also have tags.
We call these annotations. We then have an annotation manager which you can manage by tag so you can pivot everything around the tags you're working with.
This version is pushed to the web version of Polar now and the new desktop version will make it out this weekend.
We're also working on a new Polar 2.0 which will support Android and tablets and have better pen support too so you can work directly in a tablet rather than a desktop/laptop.
We're also working on a dark mode but first need to get 2.0 out the door.