This console command will open the Particle Editor tool - press the button in the top right of the newly opened window to close it.
The syntax for the particleeditor command is as follows:
Search our database of 113 Imperator: Rome commands...GO
Find below working examples of the particleeditor command.
Running the above command will open the Particle Editor window, note that running this command again doesn't toggle it off, it will simply open another Particle Editor window.