File mask question

[MrTrigger]

Hi,
I want to add all files from a folder and subfolders that end with *.txt AND *.csm, how do I express that in the file mask line? What's the delimiter character between the two file extensions?

I get how I mask out one type of file, but when I try to mask out two or more it just takes the entire line as a mask and subsequently won't include any files from those folders.

[MrTrigger]

Nevermind, I got it after some trial & error...

The line should be:
*.txt|*.csm

I coudln't find this anywhere in the help file, maybe something to add to the file mask section?