No doubt others use this, but for me it was a first.

Building a backing track for a fairly simple Bb Blues (Tenor Madness) I wanted to break up all my guitar playing with a chorus of held drums and a bass solo.

My arrangement's bass Real Track was 397 (bass Acoustic Paul).
Solid but not really what I wanted for a solo.

I hit the F5 key to bring up bar setting and poked around till i found the Real Tracks command button in the upper right.
Clicked on that & quickly change the bass to 452 (Soloist (bluesy).
12 bars later I did the same and switched it back to 397.

The results were excellent.

Sounds great and gives me a chorus to comp a little or just lay out.

biab2024(Mac) Latest Build
Mac OS Sequoia 15.0.1
Apple M2 pro 32GB Ram
Logic Pro 11