Re: temporarily overriding paper variables

[Werner LEMBERG]

>> It would be cool if this worked some day.  However, the next best
>> thing would probably be to allow negative widths and heights for
>> `\markup` boxes (if set with `\with-dimensions` and friends).
> 
> Was messing about a bit.  Does this work on your side?

Alas, no.  It is probably related to the very situation I'm working
with, namely at the edge of the page.

Here is some code to play with.

```
\paper {
  left-margin = 0
  right-margin = 0
  top-margin = 0
  bottom-margin = 0

  oddHeaderMarkup = ##f
  evenHeaderMarkup = ##f
  oddFooterMarkup = ##f
  evenFooterMarkup = ##f

  top-markup-spacing.basic-distance = 0
  top-markup-spacing.minimum-distance = 0
  top-markup-spacing.padding = 0
  top-markup-spacing.stretchability = 0

  top-system-spacing.basic-distance = 0
  top-system-spacing.minimum-distance = 0
  top-system-spacing.padding = 0
  top-system-spacing.stretchability = 0

  markup-system-spacing.basic-distance = 0
  markup-system-spacing.minimum-distance = 0
  markup-system-spacing.padding = 2.5
  markup-system-spacing.stretchability = 0

  ragged-bottom = ##t
  ragged-last-bottom = ##t

  indent = 1\cm
}

\markup \with-dimensions #'(0 . 0) #'(0 . -2.5) \column {
  \vspace #0.55
  "foo"
}

{ f'4 }
```

I want the violin clef touch the top edge of the page.


    Werner