Added in 1.9.2
/renwin <@oldname> <@newname> [topic]
Allows you to change the name of an existing window to a different one, and an optional topic can be specified.
Parameters
<@oldname> - Current window name.
<@newname> - New window name.
[topic] - Window topic/title.
Example
; Open a custom window. /window -e @Example1 ; Rename @Example1 to @Example2 and add topic 'Hello world'. /renwin @Example1 @Example2 Hello World