Index: extobj.h
===================================================================
--- extobj.h	(revision 11139)
+++ extobj.h	(revision 11140)
@@ -29,10 +29,10 @@
 struct csch_extobj_impl_s {
 	const char *name;   /* also the hash key */
 
-	void (*attr_edit_pre)(csch_cgrp_t *grp, const char *key);
-	void (*attr_edit_post)(csch_cgrp_t *grp, const char *key);
-	void (*update)(csch_cgrp_t *grp);
-	void (*gui_edit)(csch_cgrp_t *grp);
+	void (*attr_edit_pre)(csch_cgrp_t *grp, const char *key);     /* called before an attribute change */
+	void (*attr_edit_post)(csch_cgrp_t *grp, const char *key);    /* called after an attribute change */
+	void (*update)(csch_cgrp_t *grp);       /* recompute graphics */
+	void (*gui_edit_dlg)(csch_cgrp_t *grp); /* present the object-specific editor dialog */
 };
 
 void csch_extobj_impl_reg(const csch_extobj_impl_t *impl);