load rviz configuration file from command line or launch file

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Is it possible to open a rviz configuration file (ctrl + O in rviz) from the command line or preferably a launch file while an instance of rviz is running?

I know that you can launch rviz from a launch file by using the following

<node type="rviz" name="rviz" pkg="rviz" args="-d $(find package_name)/rviz/localization.rviz" />

But I was wondering if you can simply "update" the rviz configuration instead of starting a new instance of rviz with a specific rviz configuration.