+.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@