In some places in the TeXBook (e.g. top of page 364) I see things like \output={\plainoutput} where \plainoutput is a macro defined with \def. Then in Appendex E (p. 417) I see: \output{\onepageout{\unvbox255}} without an '='. What's the difference? -Peter -- Peter Seibel http://www.codersatwork.com/ http://www.gigamonkeys.com/blog/