nextButtonMid
ID of the library message to display in the "next" button. Do not use in conjunction with NextButton.
stringnextButtonMid (string)nullable
ID of the library message to display in the "next" button. Do not use in conjunction with NextButton.
Possible values: Value must match regular expression ^(MS_[a-zA-Z0-9]{11,15})?$
Example:
MS_abcdefg12345nextButtonMid
"MS_abcdefg12345"