JP1 Remotes

The One for All was just a red herring then? I thought you wanted to use it for the 4X command. I see now this is not the case. The XR15 can't do macros. Maybe you could do it with a voice command?

Not really - I wanted it sorta 'understood' I had little to no previous experience! I mentioned ...

The XR-15 can operate the cable box in IR mode. We have XR-15 UJ remotes, but we actually use 2010 vintage Comcast 1067BX3 IR remotes to control our 3 cable boxes.

Each press of the FF button gives an increase in FF speed up to 4X as displayed on the TV. I just push the button 3 or 4 times, but I ...

I thought the XR15 had an IR mode (may have to unpair). Try to use Xfinity remote to change settings in box: Menu>Settings>Remote Control>Activate IR. If remote has a setup button: press hold Setup button until light solid, then enter 987.

But I could be mistaken.

RF for the box but has IR for ...

It may even be possible to learn the 4X FF as a single command

This is and would be the desired!

The XR15 and the XG1V4 is RF - I would think this might present it's own set of circumstances. Yes or not?

I almost DM'd you on the other forum but the newer format over there seems to be a bit ...

Comcast/Xfinity has on their XG1V4 X1 Box a "Smart Resume' feature that requires for 'rapid' movement a 4 times 'depress' of the FF Button. I'm interested in a remote that could maybe control the XG1V4 Box and offer a single button 'depress' that might duplicate that 4X 'depress' function.

The ...

Knowing you have a yamaha AVR, this file has the Scene commands that will likely work. If you can't send these from your yamaha remote to learn, then the only way to add them is using a JP1 cable.
https://www.hifi-remote.com/forums/dload.php?action=file&file_id=25811

You've helped tremendously ...

I'm a new URC-7935 user and I've been helped considerably by @mdavej. I'm not wanting to bother him and I've got questions. If I can accomplish my needs less a cable programming it certainly interests me. I had one that I tried unsuccessfully to pair to an ATV4, a Samsung Plasma and Yamaha AVR. The ...