See Video: Reaper-BBPluin-Song-Sections.mp4
Download: Reaper-BBPluin-Song-Sections.mp4
This allows you to easily add different Style or tracks sections.
Using Tabs is an easy way to gen different sections, until they get the drag n drop track template working allowing you to stay in the one Tab.
Also to see what instruments are where: Write RT RD Names in items using Take Markers (Reaper)
Remember to put Part Markers after the last bar so it will play a pre fill if it goes into a post fill.

You can enable mute buttons or drag the clip volume up/down when all selected
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See Kenny's video: