The Sieve language is described in RFC 3028. @xref{Top, Emacs Sieve,
Top, sieve, Emacs Sieve}.
+@item (agent parameters)
+If the agent has been enabled, you can set any of the its parameters
+to control the behavior of the agent in individual groups. See Agent
+Parameters in @ref{Category Syntax}. Most users will choose to set
+agent parameters in either an agent category or group topic to
+minimize the configuration effort.
+
@item (@var{variable} @var{form})
You can use the group parameters to set variables local to the group you
are entering. If you want to turn threading off in @samp{news.answers},
@subsection Topic Parameters
@cindex topic parameters
-All groups in a topic will inherit group parameters from the parent (and
-ancestor) topic parameters. All valid group parameters are valid topic
-parameters (@pxref{Group Parameters}).
+All groups in a topic will inherit group parameters from the parent
+(and ancestor) topic parameters. All valid group parameters are valid
+topic parameters (@pxref{Group Parameters}). When the agent is
+enabled, all agent parameters (See Agent Parameters in @ref{Category
+Syntax}) are also valid topic parameters.
In addition, the following parameters are only valid as topic
parameters:
customizable variables. The complete list of agent parameters are
listed below.
+@cindex Agent Parameters
@table @code
@item gnus-agent-cat-name
The name of the category.
@item gnus-agent-cat-length-when-long
an integer that overrides the value of @code{gnus-agent-long-article}.
+
+@item gnus-agent-cat-disable-undownloaded-faces
+a symbol indicating whether the summary buffer should @emph{not} display
+undownloaded articles using the gnus-summary-*-undownloaded-face
+faces. The symbol nil will enable the use of undownloaded faces while
+all other symbols disable them.
@end table
The name of a category can not be changed once the category has been