footerMid
ID of the library message to display in the footer. Do not use in conjunction with Footer.
stringfooterMid (string)nullable
ID of the library message to display in the footer. Do not use in conjunction with Footer.
Possible values: Value must match regular expression ^(MS_[a-zA-Z0-9]{11,15})?$
Example:
MS_abcdefg12345footerMid
"MS_abcdefg12345"