Alternative syntax

A dollar command can be used to alter the syntax for the If statement.  Namely, Endif is introduced as a keyword when $Onend is active and becomes illegal upon use of $Offend.  When active, Endif ends the If statement.  The dollar command option is employed using the syntax

$Offend

or

$Onend

Setting the $Onend dollar command will make the alternative syntax valid, but makes the standard syntax invalid.