Why is everything just GONE in 3D view?

Support Basics & Interface
1

I was working on a character, with the objects in the scene being an armature, a mesh object, a camera and a light. Suddenly I leave edit mode for the mesh and the armature, camera and light are just GONE! They appear in the outliner, but nowhere in 3d view. Unhiding does nothing. What the h*** is going on here?!?

Edit: Layers are only the one, the problem remains when closing and reloading.
Edit: Outliner visibility does nothing!
Edit: When selecting the armeture in the outliner, it is in pose mode (I left it in pose mode), and rotating rotates the last selected bone, even though the bone is invisible; only the mesh connected to that bone rotates.

2

Have you tried selecting one of the missing things in the outliner and press Numpad+. ?

Have you checked if local view is on?

3

That looks like local view.

It it is not the case, that could be Extras overlay that is disabled.
Or that could be Object Types Visibility filters.

4

How do I leave local view??

5

menu View > Local View > Toggle Local View or Numpad /

6

YES!!! THANK YOU!!! Everything is back where it belongs!