A number of special characters and objects can be used to manipulate Pd messages.
Message entries separated by commas are sent out sequentially rather than as a list.
A dollar sign ($) symbol, followed by a number from 1 to 9, in a message box will be replaced by the corresponding item from an incoming message.
The word set followed by any message can be used to change the contents of a message box without triggering output.
The [append] and [prepend] objects can be used to modify message strings.
The semicolon character (;) causes the subsequent word in a message to be interpreted as the name of a [receive] object and the remainder of the message (up until the next semicolon) is sent to all [receive] objects of that name.
