-.B @include:\fIPATH\fR@
-Include the named file as if it were a template file. If \fIPATH\fR
-starts with a \fB/\fR then it is used as-is; otherwise, ".html" is
-appended and the template path is searched.
+.B @image:\fINAME\fB@
+Expands to the (possibly relative) URL for image \fINAME\fR.
+.IP
+If there is a label \fBimages.\fINAME\fR then that will be the image base name.
+Otherwise the image base name is \fINAME\fB.png\fR or just \fINAME\fR if it
+alraedy has an extension.
+Thus labels may be defined to give images role names.
+.IP
+If there is a label \fBurl.static\fR then that is the base URL for images.
+If it is not defined then \fB/disorder\fR is used as a default.
+.TP
+.B @include:\fIPATH\fB@
+Include the named file as if it were a template file.
+If \fIPATH\fR starts with a \fB/\fR then it is used as-is;
+otherwise, ".html" is appended and the template path is searched.