-* Readers of this chapter should already understand how to install either the crossref:x11[x11,X Window System] or crossref:wayland[wayland,Wayland] on FreeBSD.
+* Readers of this chapter should already understand how to install either the <<x11>> or <<wayland>>.
* Readers are instructed throughout this chapter to install official packages.
-Refer to the section on crossref:ports[ports-using,using the ports collection] to build customized packages from ports.
+Refer to <<ports-using>> to build customized packages from ports.