DuplicateRiff

From Guide

DUPLICATE an existing Riff so that you can expand on it for another part of your song. Example: You've made a Riff that contains bass and rhythm guitar layers, but you want to have a solo on top of those two in a later part of the song. Duplicate the riff, and then add the solo to the copy. You've just saved yourself the process of having to re-record the rhythm guitar and bass parts.

You can also duplicate Riffs by right-clicking on the Riff while holding and dragging the Riff to an empty rectangle within the RiffList grid.