Weird orange track icon?

[GoRhino]

Hi,

Been mucking around with setting up a control surface in latest version of W9. Muddling through without benefit of any manual and/or video, but seemed to get a few things to work OK-ish.

Anyway, I noticed that each of the first 7 tracks now have a kind of small right angle shaped orange icon in the top left corner just above where the track name is in each of those tracks (on the left side, just above the input). There is no such marking on the remainder. Never seen this before, what is it? what does it mean? how did I do it, and how do I get rid of it?

Thanks.

[dRowAudio]

It's to show you what tracks are currently being controlled by your control surface. If you change banks left/right, you'll see them change tracks.