\with-dimensions partially

[Fr. Samuel Springuel]

Is there a way to set the horizontal dimensions of a markup to 0 while leaving 
the vertical dimensions alone?

I’ve got the following as a start, but it zeros both X and Y dimensions.  
Ideally I’d like the second argument to be computed automatically:

Cantor = \markup \with-dimensions #'(0 . 0) #'(0 . 0) {\italic Cantors:}


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Fr. Samuel, OSB
(R. Padraic Springuel)
St. Anselm’s Abbey
4501 South Dakota Ave, NE
Washington, DC, 20017
202-269-2300
(c) 202-853-7036

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