I have just released some simple RStudio add-ins that are great for creating keyboard shortcuts when working with pipes in R.
You can install the add-ins from here (which also includes both installation instructions and use instructions/examples).
Data Scientist and trainer at Win Vector LLC. One of the authors of Practical Data Science with R.
Another two good choices for binding are:
That way you are treating the argument list as a space-like separator and the pipe symbol as a line-end-like separator.
I’ve added the ability for the user to set arbitrary add-in bindings through options to the addinexamplesWV package. Instructions here: https://github.com/WinVector/addinexamplesWV