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There are two objects in my 3D-view:
A red object
A white object
Both are overlapping each other.
I have added several keyframes of animation to the red object. When I select the white object, all keyframes disappear from timeline. They reappear if I select the red object again.
Why do keyframes disappear from the timeline?
What am I missing?
This is a feature. You only see keyframes for the selected object in the timeline. If you want to see all your keyframes, I would use the Dope Sheet.
The arrow icon only shows the key frame from the selected object.
The ghost icon shows keyframes form hidden objects.
The life saver :P(I think that the official name?) shows broken drivers.
This is how the timeline works:
The Timeline is not much of an editor, but more of a information and control window.
Here you can have an overview of the animation part of your scene What is the current time frame, either in frames or in seconds, where are the keyframes of the active object, the start and end frames of your animation, markers, etc...
Emphasis mine
If you want to see all the keyframes in the scene, use the dopesheet (ShiftF12). Click the ghost icon in the header to make keyframes on hidden objects visible:
had the same issue.
the solution in my case was to disable Auto Keying: Editor Type > Timeline > click on the auto key button.
hope this helps
