Reduce subdivision quality in viewport on multiple objects at once I increased the viewport quality on my subdivision but forgot to reduce it after finishing the model and have since duplicated the model like 60 times, is there a way to turn down the viewport quality on all of them at once since it happened on two separate models and I'd rather not go through 120+ objects reducing the quality manually but blender is starting to lag from the massive amounts of geometry it's having to render in real-time.
One way is to use the Simplify function.

You can set Max Subdivision for Viewport or Render in your whole scene.
Render Tab > Simplify > Viewport