I really need this too, something like Bear app, but stronger. I lost my notes a lot and I need to find them easily. It would be great if we can tag a sentence or a paragraph.
Create a “Tags” column. In that column I enter my tags, which are strings preceded by a forward slash. So it’ll look like /OG or /Map or /Drawing. (I use the forward slash instead of hashtag because the slash doesn’t require the Shift key as the hashtag does.)
Then, I create Saved Searches for each of the Tags. They live in the Sidebar under the Filters tab. If I want to filter the view to show just those items I’ve tagged, I click on the Filter. (Note: the results show the tagged items and their parent items for context.)
OR … you can enter the Tag in the Search Bar and do a Batch Find, in which case the results show up in the Sidebar.