How do I move buffers, please?

I cannot remember now how to move buffers from the middle of a track to the end, where they should be.
These are on Sherman Hill, I did move them about 3 years ago, when we got the original route, but, since my Cancer treatment my brain isn't functioning properly any more, and I've forgotten how to do it.
Can some kind soul please explain the procedure again to me please, in simple terms.
Thank you.
Cheerz. ex-railwayman.
These are on Sherman Hill, I did move them about 3 years ago, when we got the original route, but, since my Cancer treatment my brain isn't functioning properly any more, and I've forgotten how to do it.

Can some kind soul please explain the procedure again to me please, in simple terms.

Thank you.
Cheerz. ex-railwayman.