Share Email Facebook Twitter LinkedIn Commands for Improving Performance When Using Xrefs Use these commands to manage system performance when using external references in AutoCAD LT. Commands EXTERNALREFERENCES (Command) XCOMPARE (Command) XCOMPARECLOSE (Command) XCOMPARERCNEXT (Command) XCOMPARERCPREV (Command) XREF (Command) System Variables COMPARESHOWCONTEXT (System Variable) INDEXCTL (System Variable) TREEDEPTH (System Variable) TREEMAX (System Variable) XCOMPAREBAKPATH (System Variable) XCOMPAREBAKSIZE (System Variable) XCOMPARECOLORMODE (System Variable) XCOMPAREENABLE (System Variable) XLOADCTL (System Variable) XLOADPATH (System Variable)