seeking alternative method to copy a large section of my R program

Is there any way I can insert markers at the beginning and end of a large
section of R statements and then copy all text in between to clipboard?

I have trouble scrolling to select long sections, so if there is another way
I would like to know it!

Each interface is going to be a bit different, but on both the Mac and Windoze I can position the cursor at one end , hold down the shift-key, scroll to the other end and release the shift-key and I will have the target ready for either an Edit/Cut or a cmd-C/ctrl-C.

David Winsemius
Alameda, CA, USA