Blender ver. 4.2.2 LTS
I need some help understanding 2 specific quirks of the NLA Editor. Maybe you can help me understand why it behaves the way it does.
- I have many objects in my scene, but ALL are listed in the Editor column, regardless if they have actions or animation data attached to them. I often have to scroll scroll scroll down to find the animation strips I actually need to see.
These stacks CAN be collapsed, but they tend to re-open each time I boot up the scene again. Why do you suppose it does this? Is there a way to hide them completely?
- I can disable stack evaluation. Pretty straightforward. Some objects I cannot though. Why is this?
Due to insufficient permissions, I cannot yet upload a full blender file. Sorry, fellas.
Thanks in advance!
Enable the selection arrow in the NLA editor (the blue arrow on the left hand side shown below). That will then limit what’s shown to the current selection. You can also disable the one two to the right, to exclude datablocks with no NLA data.
If they’ve ever been animated, an action may still be on the objects, so they would show up even if there were no keyframes on the action. It would show on the right hand side if you click on one of the strips, then you can either unlink the action from the object directly in the NLA editor’s N panel, by clicking the cross next to the action name:
Or delete the unwanted action in the outliner’s blend file mode.
If it’s none of those, I’m not sure. Maybe try updating to a later build of Blender, incase it’s a bug.
Oh, and they would also show if there’s a driver on those objects, even without an action assigned. Disabling this button will hide those:
Wonderful! Thank you so much for clearing all these up for me. You rock. 
