Of course! Well I tried: (if (featurep 'xemacs) (require 'overlay)) ;; compatibility (if (string-match "X[Ee]macs" emacs-version) (progn ; (defalias 'matlab-make-overlay 'make-extent) (defalias 'matlab-make-overlay 'make-overlay) (defalias 'matlab-overlay-put 'set-extent-property) (defalias 'matlab-overlay-get 'extent-property) ; (defalias 'matlab-delete-overlay 'delete-extent) (defalias 'matlab-delete-overlay 'delete-overlay) ; (defalias 'matlab-overlay-start 'extent-start-position) (defalias 'matlab-overlay-start 'overlay-start) ; (defalias 'matlab-overlay-end 'extent-end-position) (defalias 'matlab-overlay-end 'overlay-end) ; (defalias 'matlab-previous-overlay-change 'previous-extent-change) (defalias 'matlab-previous-overlay-change 'previous-overlay-change) ; (defalias 'matlab-next-overlay-change 'next-extent-change) (defalias 'matlab-next-overlay-change 'next-overlay-change) (defalias 'matlab-overlays-at (lambda (pos) (extent-list nil pos pos))) But the behavior did not change :'( Uwe _______________________________________________ XEmacs-Beta mailing list XEmacs-Beta(a)xemacs.org http://lists.xemacs.org/mailman/listinfo/xemacs-beta