David if you want to send tracks to busses for Effects that is fairly straight forward.

Use the top right fx busses (8 total) and add the effect you want (reverb for example) the dial in the amount in the tracks,

To use sub groups (example drums) maybe to process the drums through a gate or compressor The do the following

1. In options/Preferences (CTRL F5) and check the box "Unassigned output ports work as subgroups" You will notice that the 16 A1 Thru A16 are now named A 1 and G2 thru G16

2. Add whatever you want to the sub group of choice.

3. to send tracks there click the out on the track and go to Ports: (5th option down on the list) and chose the group wanted It will output back to the Master (A-1)

Not easy to find but easy to do once you have it. I am printing this out and keeping it in a folder of RB tips and tricks.

HP Win 11 12 gig ram, Mac mini Sonoma with 16 gig of ram, BiaB 2025, Realband, Reaper 7, Harrison Mixbus 9 32c , Melodyne 5 editor, Presonus Audiobox 1818VSL, Presonus control app.