New OP-1 field questions- Finger Sequencers help

I recently got an OP-1 field, it’s my first Teenage Engineering instrument. I am very excited, it is amazing! I haven’t gotten around to recording to tape yet, I’m starting out by exploring the synths (beautiful) and sequencers. The Finger Sequencers have me confused. I would love any insights into how they are used.

Edit: I didn’t understand that most of the stuff in the OP-1 field was previously in the OG OP-1, so a YouTube search turned up a lot of helpful information and I’m rolling now.