Syntax - @MID(Text,NumCharacters1,NumCharacters2)
Parameters :
Text - Any text or numeric field.
NumCharacters1 - Any integer.
NumCharacters2 - Any integer.
Action - Returns a string consisting of characters in Text, starting at NumCharacters1, with the length determined by NumCharacters2.
Example - @MID([INV:Description],5,10)
Result - Prints ten characters of the Description, starting with the fifth character.
See:
Filters and Formula Functions - All
Filters and Formula Operators
Filters - Transaction Types