[String->Substring] returns a substring. The start of the substring is defined by the first parameter and the length of the substring is defined by the second parameter. Requires two integer parameters.
String Variable->substring(Offset, Length)
Use the [String->Substring] method to return the first 1024 characters of a field value. The field Description is stored in a variable by the same name and then trimmed to 1024 characters.
var(Description = field('Description')) $Description->substring(1, 1024)
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