If the pattern is omitted, this command deleted the last line received from the MUD. If pattern is included, any line from the MUD matching the pattern is deleted from the input screen. This allows you to remove text that you don't want to see. The last syntax is equivalent to #ACTION pattern '#GAG'.
The numeric argument to the GAG command specifies the number of lines to GAG. If the number is omitted, a single line is gagged. If the number is negative, the indicated number of lines prior to the current trigger line are gagged.