(space)comments
statements;;comments
Lines that begin with space are disabled. They can be used as comments.
Syntax2 can be used to place comments after commands in the same line.
Syntax1 also can be used as label with goto.
Lines that begin with /, \ or ; also are disabled.
Easiest way to disable/enable a line (or several selected lines) - right click the selection bar.
This is comment key Y ;;Enter