window notify_level [<levels>]

This works similarly to window level, except the levels specified determine what types of messages the client will report activity in that window for if window notify is on. If no level is specified, the current level is displayed.

The list of levels to use may be any of those allowed for window level A comma-delimited list may be used to specify more than one level at once.

To only show activity for private messages and notices:

/window lastlog_level msg,notice