I notice that some of the trigger words have a ^ (caret) after them. For example, subroutines in WinBatch begin with a [ :label ] and end with the word [ Return ]. In fact, the thing that indicates a subroutine is that the first word on that line starts with a [ : ] (colon). So, all WinBatch subroutines look like this -

:Subname
	some code
	lotsa code
	goes here
Return

In the UDL editor, I noticed that these triggers look like this:

Open:
[:^                ]
Middle:
[                  ]
Close:
[Return^           ]

I believe the caret indicates that the trigger word must be the first word on the line. Am I correct? Can there be white space before the trigger keyword?

Where can I find documentation about this? (And I wonder if there are other modifiers that can be used in defining trigger words?)

Notepad++ v8.4.2 (32-bit)
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