Outliner and Layer

Question

In Blender the "outliner" Panel displays an overview of all objects in the current project. During work I moved a Blueprint to an other Layer, but if i want to bring it back to Layer 1 i realized that the "outliner" dont show the current layer of an object. After a Hour i found out that the layer displayed in the the "Properties" panel under "Object" > "Relations" > "Layers". Is there an faster way to find out the current Layer? Or is there an Addone to Show the Layer of an Object in the outliner Panel (where it belongs i suggest)?

Answer 1

The layers of a scene are here: At the bottom of the 3D view window There are 20 of them and they are accessible when in Object Mode.

A selected object will show the layer where is at with a bright orange dot (The dot will show even if the layer is the active layer in the viewport)

If the object is active in multiple layers then you'll see a bright orange dot for every layer in which the object is active.

There are two ways to make an object be in a layer.

1- Select the object you want to move and press M and select the layer you want to move to:

Or you can just type M and the layer number. E.G. M4 will move the object to layer 4

To have the object exist in more than one layer press the Shiftkey while selecting. For example MShift134 will make the object exist in layers 1,3 and 4. This image reflects that:

To make layers visible Just enable them at the bottom of the 3D View window by clicking on them. To enable more than one layer use shift.

2- The other way to determine an object belong to a layer is on the properties window Relations section:

Answer 2

As far as I know there is no faster way to do it and no add-on that can display them in the outliner. The object can be on multiple layers, so you would need a space for these 20 layers in outliner.