Using Layers to Manage Complexity
To turn a layer on and off
- On the Object Properties toolbar, click the Layer control (list box).
- Click the On/Off icon of the layer name that you want to turn on or off.
If the lightbulb is on, the layer is turned on.
Alternate Procedure
In a drawing with many layers, it is usually faster to change properties of layers in the Layer & Linetype dialog box, where you can use filtering to find the layers you need quickly.
- On the Object Properties toolbar, choose Layer.
- In the Layer & Linetype Properties dialog box, click the On/Off icon of the layer that you want to turn on or off.
- Choose OK.
Object Properties toolbar: 
Command line equivalent: LAYER