Keyframes disappearing I was working on Blender for 2D animation and at some point the keyframes just disappeared. They are still there hidden because I can access my drawings but the yellow squares are not visible anymore:

Did I activate some shortcut by accident ? Or is it a bug regarding grease pencil ?
EDIT 1: The solutions given here Hidden keyframes in timeline do not solve my problem. Scrolling up as much as I can do not bring back the keyframes, nor clicking view -&gt; Frame all.

Normally I should see the layers below &quot;summary&quot; but here they just disappeared but they are still visible in the layer panel.
As mentioned there are many possible causes but I had this problem because of some mysterious activation of the setting Only Show Selected, &quot;Only include channels relating to selected objects and data.&quot; I do not know exactly why this gets set (besides obviously clicking it) but clicking its button (so that it is not the active blue color) brings back the keyframes.