How to copy, paste, and edit a segment of timeline

[Jack2438043011vo]

I am working with an animate file made by someone much more experienced than me. How can I copy the segment tagged "talkCycle", create a new segment tagged "walk", and then adjust the positions of the layers to create a new animation segment in this format. 

[JoãoCésar]

Hi.

There are many ways of doing this but I certainly prefer to Shift or box select the frames I want and then hold Option / Alt and drag the frames to the new position. Like this: https://bit.ly/3P9NBHs.

I hope it helps.

Regards,

JC