[Rwp] How to copy and paste time based selection?

[Alan]

Hi, guys,
I'm feeling so stupid right now, after more than 30 minutes of testing, 
I cannot copy, for example, from bar 2 to bar 34 of a track to paste it. 
I'd like to copy from 2 to 34 of all tracks to duplicate the length of 
the recording, but I just cannot figure out how to do it.
Reaper is copying my seven tracks all the time and pasting new tracks 
instead.

How does it work?

Thanks in advance!