François Fasoli wrote:

I have found the following somewhere in the documentation. \button{...}[the chapter on whatever] \button{...}[otherdoc::some topic] \button{...}[previouspage] \button{...}[PreviousJump] I have tried them : all run very well except \button{...}[otherdoc::some topic] How can I replace some topic to indicate a chapter in otherdoc or a page ?

you need to register the otherdoc by using \useexternaldocument hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------