Fwd: [tablatures] Slur from Grace Note to Normal Note

I forward to the list, with the original file attached (sent in another private email to me).

---------- Forwarded message ----------
From: Mitchell Pryor <pryor27616@xxxxxxxxx>
Date: 2013/8/12
Subject: Re: [tablatures] Slur from Grace Note to Normal Note
To: Federico Bruni <fedelogy@xxxxxxxxx>

I think I've found the solution to this problem using the following two adjustments:

\override Slur #'positions = #'(1.0 . 3..0)

\override Slur #'extra-offset = #'(0.0 .. 0.3)

\grace b16\2( c'1\2)

This positions the slur just about how I would like it.

Thanks again for your help.

From: Federico Bruni <fedelogy@xxxxxxxxx>
To: oldwhtman <pryor27616@xxxxxxxxx>
Cc: tablatures@xxxxxxxxxxx
Sent: Monday, August 12, 2013 2:46 AM
Subject: Re: [tablatures] Slur from Grace Note to Normal Note

2013/8/12 oldwhtman <pryor27616@xxxxxxxxx>

Lilypond version 16.0.0

I'm trying to use \override Slur #'positions = #'(0.0 . 3.0) to adjust the
end point of a slur from a single grace note. The slur is below the notes
and I'm trying to raise the end point up closer to the fret number, but it
won't let me. I can lower it to a ridiculously low point on the tab staff
but it won't let me raise. I want it to almost touch the fret number as
there is a fret number below it on the adjacent string that the slur is
colliding with.

Can anyone help me override this constraint?

Please provide a minimal example:

http://lilypond.org/website/tiny-examples.html