i_CTRL-R to the end of current line (and related stuff)

I routinely use i_CTRL-R CTRL-w while typing in a command and grabbing the contents of the current word my cursor is on.

I wanted a few more options, for example, I wanted to grab from my cursor to the end of the line (i.e. y$).  To do this of course I could y$, before typing the command, which I do as a work around. But this means I have to abandon what I have already typed, then redo it.

I was trying to find in the help what options are available to me and I can't even find the one I use all the time.

:h i_CTRL-R

Shows me a bunch of special items:

'"' the unnamed register, containing the text of

the last delete or yank

So I can do:

i_CTRL-R" (to grab register ")

i_CTRL-Ra (to grab register a)

Based on the help, to find my CTRL-w, I thought it would be:

:h i_CTRL-R_CTRL-w

But that help location does not exist, even though these do:

:h i_CTRL-R_CTRL-r

:h i_CTRL-R_CTRL-w

So 2 questions:

1.  How do I find in the help where it says I can do i_CTRL-R followed by CTRL-w

2.  Does anyone have a suggestion on how I can do i_CTRL-R followed by something like y$ to get to the end of the line in some way.  I was thinking I could do this using the expression register.  i_CTRL-R= then do something like y$, but that didn't work.  If I can do something along that line, then that opens the door to using whatever standard Vim keys I need.

TIA,

David

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