I have modify this sample
\newdimen\currentlayerheight
\newdimen\currentlayerwidth
\newbox\Content
\definelayer[TicketSummary]
[x=\backspace, y=\topspace,
width=4in, height=4in,
repeat=no]
\setlayer[TicketSummary][hoffset=.5\backspace, voffset=2.5in]{%
\unprotect%
\currentlayerheight=\dimexpr\csname @@llTicketSummaryheight\endcsname\relax%
\currentlayerwidth=\dimexpr\csname @@llTicketSummarywidth\endcsname\relax%
\protect%
\setbox\Content=\vbox{\hsize=\currentlayerwidth%
\bold{Client Name:} \\
Acme Corporation \\
\bold{Location of Work:}
Main warehouse
}%
\ht\Content=\currentlayerheight%
\ruledhbox{\box\Content}
}
\setupbackgrounds[page][background={TicketSummary}]
\starttext
Hello world!
\stoptext
minimals: no erros, bu evince says
Error: ExtGState 'Tr0' is unknown
Error: ExtGState 'Tr0' is unknown
Error: ExtGState 'Tr0' is unknown
Error: ExtGState 'Tr0' is unknown
Error: ExtGState 'Tr0' is unknown
minimals-beta: errors
! You can't use `\dimexpr' in restricted horizontal mode.
l.12 \currentlayerheight=\dimexpr
\csname @@llTicketSummaryheight\endcsname\r...
?
--
luigi
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