> I want to tweak the spacing between double dots, which is a bit wide
> (in my context, at least). I have found ways to reduce the spacing
> before and after the group of dots, but can't uncover anything that
> relates to spacing within the group.
You have to override the 'stencil' property of the 'Dots' grob with
your own function. Right now, it uses `ly:dots::print` (see file
`output-lib.scm`), which takes the horizontal extent of Emmentaler's
'dots.dot' glyph as a padding value while stacking the dots
horizontally.
Copy this function to your input file, call it 'my-dots' and slightly
modify it to, say, multiply the padding with factor 0.9, then register
it by saying
```
\override Dots.stencil = #my-dots
```
Werner
