1 01/20/86  read_mail request:  switch_on, swn
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 3 Syntax:  swn switch_name {message_specifiers}
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 5 
 6 Function:  turns on a specified switch for each selected message.
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 8 
 9 Arguments:
10 switch_name
11    currently must be the keyword "seen". The seen switch is on for a
12    message that has been printed previously by the print request.
13    Turning on a message's seen switch prevents it from being
14    included in the value of the "unseen" message specifier.
15 message_specifiers
16    identifies messages for which the switch is to be turned on.  If no
17    message_specifiers and no selection_args are specified, the current
18    message is  assumed.  For more information on message specifiers,
19    type:
20          help message_specifiers.gi
21 
22 
23 Access required:
24 The user requires "d" extended access to the mailbox.