Three ways to turn off a collection? Why?

Hi there. Blender 2.8.
Why are there are three ways to hide a collection in the outline? What are the differences between them from the users perspective?
The Tick on the left, the eye icon, the monitor icon.

By default there is only the check mark and the eye.

  • The checkmark completely disables a collection, similar to disabling a layer in 2.79, and makes it not appear in either the viewport or the render view.

  • The eye toggle only applies to the viewport for the current view layer. It’s a temporary thing that gets unset when you unhide all.

  • The screen icon applies to all view layers, as well as linking. This means it can be animated. This is for permanently hiding things in the viewport.

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@William

do you know, if keyframe animation of those toggles (collection) and working view layers will come before 2.8 release? Especially for product shot’s for multiple products, it’s really important to keyframe visibilty of certain objects easily.

At the moment I animate the scaling of objects, but I think that’s not the memory efficient way. If I want to animate visibility of hundrets of objects I have to use python scripts, because every keyframe has to be set manually.

Aside of loc,rot,scale keyframes, one could also bring some visibility options to the “I” key

Could only find this task about this topic, https://developer.blender.org/T55233

This is apparently a non-trivial techical issue - so probably won’t be handled in 2.80. You can set up drivers to set visibility for multiple objects, but yes, if would be easier if you could key this on a collection level.

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