Thanks Hans and Wolfgang! Yes, it looks like most PDF viewers don't handle layers right now, but I'm fine with Acrobat for this use case.

Chris Chapman Pentandra

----- Original Message -----

From: "Hans Hagen" pragma@wxs.nl To: "mailing list for ConTeXt users" ntg-context@ntg.nl Sent: Thursday, July 3, 2014 11:54:27 AM Subject: Re: [NTG-context] Support for Optional Content Groups

On 7/3/2014 5:55 PM, Chris Chapman wrote:

...

I am new to ConTeXt (coming from LaTeX), and am really impressed. Great work!

I am working on a document that has layers that I want to be screen-only, similar in approach to this: http://tex.stackexchange.com/questions/167846/implementing-full-page-screen-...

I am assuming that Optional Content Groups would be the best way to do this. How would I set something up like this in ConTeXt/LuaTeX? I know I could make a screen-only version and a print version of the output pdf, but I want to have my cake and eat it too ;)

(also see wolfgangs mail)

I tried this in acrobat:

\defineviewerlayer[visibleandprint] [printable=yes,state=start] \defineviewerlayer[visibleandnotprint] [printable=no, state=start] \defineviewerlayer[notvisibleandprint] [printable=yes,state=stop] \defineviewerlayer[notvisibleandnotprint][printable=no, state=stop]

\setupinteraction[state=start]

\starttext

\startviewerlayer[visibleandprint] visible and print \stopviewerlayer \blank \startviewerlayer[visibleandnotprint] visible and not print \stopviewerlayer \blank \startviewerlayer[notvisibleandprint] not visible and print \stopviewerlayer \blank \startviewerlayer[notvisibleandnotprint] not visible and not print \stopviewerlayer \blank

\stoptext

and found out that we need an extra piece of info for acrobat to be happy. I'll upload a beta with that addition.

I wonder if other viewers handle layers well.

Hans

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                                       Hans Hagen | PRAGMA ADE
           Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
 tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                          | www.pragma-pod.nl

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Hello together,

I'm having trouble framing multiline equations. Problem is that either I get an error or the equation gets framed while the multiline is converted into a single line. Here is my code:

--------------------- \starttext

\startformula <- works like a charm \mframed[offset=1mm,loffset=3mm,roffset=3mm] {a + b = c} \stopformula

\startformula \startalign <- that's an example multiline equation \NC c - a = \NC b \NR <- unframed it works \NC d + c - b = \NC a \NR \stopalign \stopformula

\startformula \framed{\startalign <- \mframed gives an error. \framed works, but then the eq \NC c - a = \NC b \NR <- gets converted into a single line eq. \NC d + c - b = \NC a \NR \stopalign} \stopformula

\stoptext ---------------------

I tried to place \mframed at different locations. But the example above is the only one that doesn't give an error. How would an experienced CTX user frame multiline equations? I think it would work with natural TABLES. But i would only use that way, when nothing else works...

Greetings, Seba