There's no way to do that yet - and it's a big limitation in my view. Global changes to all saved views would be a huge improvement. One of my projects has 50 saved views - all set to Pathtrace High. It takes a very long time for them to refresh when opening the project - would be nice to change them all to not Pathtrace, or Pathtrace Low - or archive them not be refreshed.
In the case of saved views, it is best that you can select views for global settings in the same way as you select views for export. That would be a great solution! 😃
Thanks for the feedback. If you haven't done so already, please make sure to submit this feedback on the roadmap here so the developers can track this and consider making this a change for future updates.
* maybe the simplest thing would be to enter a shortcut like [Shift+R] or [Alt+Shift+R] etc to quickly freeze and unfreeze Path Tracer activity of all views, videos etc that have Path Tracer mode enabled:
* view slides from Path Tracer can display Path Tracer freeze status: