<commands_only_on> This command changes the macro interpretation.   The part of the macro that follows <commands_only_on> is interpreted so that only commands are executed and all the other text (keys) is ignored.  This allows to nicely format macro consisting only  from commands.  The <commands_only_off> causes that also all the text (keys) is interpreted usual way. 

Command Tree:   Macro Flow Control    \  Commands Only  \  ON
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Syntax:   <commands_only_on>
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Example:   <#> This macro shows how to use 'commands_only_on'
<#>
<commands_only_on>

<label>("lbl_Again")

<msg>(100,100,"Starting Notepad ...","Message",0)
<execappex>("notepad.exe","","",0,0)
<msgoff>

<commands_only_off>Hello,

this macro just demonstrates 'commands_only_on/off' commands.
<commands_only_on>

<varset>("vAgain=YES/NO","Do you want to run this macro again ?")
<if>("vAgain==YES")
   <goto>("lbl_Again")
<endif>