zooming or short-cut key

In Xemacs 21.4, I would like zoom-in and -out of a document with the mouse scroll wheel, but don't know how to set that up. If for whatever reason this is not possible, would it be possible to create a short-cut key to convert all characters in a document, which are let's say font_size 12, to another font, for example to font_size 24, which would have the same effect as zooming-in? Sirano <http://www.sgc.utoronto.ca/pmwiki/pmwiki.php?n=ubiquitinbiology.HomePage> _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://calypso.tux.org/mailman/listinfo/xemacs-beta