Thank you both.
I got as far as \dimexpr (expressions) page in the Wiki, and all the words made sense, more or less, but not the whole.
In case anyone else find this useful, I have success with Wolfgang 2 and 3, with (2) being the simplest....but that may just be the fit to my brain.
It's building stacked progress bars for documents with subsections, in case anyone searches this- colours and prettification to follow!
Ian
On 2 March 2011 11:41, Wolfgang Schuster
<schuster.wolfgang@googlemail.com> wrote:
Am 02.03.2011 um 12:25 schrieb Ian Lawrence:
> Sorry. me again...and I have been all over the wiki, mailing lists and manuals...
>
> I have this:
>
> \setlayer [progresssteps] % name of the layer
> [hoffset=904 px, voffset= 28\nuggetnumber px] % placement (from upper left corner of the layer)
> {\stepstack} % the actual contents of the layer
>
> And I am hoping that as I increase nuggetnumber the voffset of the layer will be 28*nuggetnumber
Variant 1:
\newdimen\baseoffset \baseoffset=28px
\setlayer[…][voffset=4\nuggetnumber]{…}
Variant 2:
\def\nuggetnumber{4}
\setlayer[…][voffset=\dimexpr28px*\nuggetnumber\relax]{…}
Variant 3 (what i suggest):
\definemeasure[baseoffset][28px]
\definemeasure[verticaloffset][\dimexpr\measure{baseoffset}*4\relax] % replace “4” with your own factor
\setlayer[…][voffset=\measure{verticaloffset}]{…}
Wolfgang