[luatex] topskip

[Hans Hagen]

On 27-7-2010 10:38, Patrick Gundlach wrote:
> Hi,
>
> is there a Lua way of saying
>
> \topskip=0pt

some gluespec are, that is, 0pt is one of those predefined ones, so you 
cannot change that gluespec (there is a writable flag test for that)
if you set a glue, best assign a copy of the gluespec and change values 
in the copy; gluespecs are shares and have their own nasty pending  buglets

Hans


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