The Substrings In collection contains the matches in the specified source.
You can look for matches in the System Clipboard, in a Named Clipboard, in a variable, or in a file.
You can scan for exact string matches, case insensitive string matches, or regular expression matches, or (v10.0+) for strings separated by exact string matches, case insensitive string matches, or regular expression matches.
The result, stored in the For Each action variable, can be either:
For the range option, the variable contains the position and length with a comma between them, so you can use the normal variable array indexing to access the two numbers, eg if the For Each variable is theRange, then theRange would be the position, and theRange would be the length of the match.
Here's a practical example which superscripts all the numbers in the clipboard.