LAYISO Command

LAYISO Command

Hides or locks all layers except those of the selected objects. 

All layers except the layers of the selected objects are either turned off, frozen in the current layout viewport, or locked, depending on the current setting. The layers that remain visible and unlocked are called isolated. 

The following prompts are displayed: 
Select Objects on the Layer(s) to be Isolated
After selecting one or more objects, all layers  except the layers of the selected objects are either turned off, frozen in the current layout viewport, or locked, depending on the current setting. The layers that remain visible and unlocked are termed  isolated. 
Locked layers are faded by default. You can specify the percent of the fading from the Lock option in this command. You can later change the value with the LAYLOCKFADECTL system variable. 
If you make changes to layers within a session and you want to restore the layers to the state they were in immediately before you entered the LAYISO command, use the LAYUNISO command. 
Settings
Controls whether layers are turned off, frozen in the current layout viewports, or locked. 
Off 
Turns off or freezes all layers  except  the layers of the selected objects. 
Vpfreeze

In a layout, freezes all but the selected layers in the current layout viewport only. Other layout viewports in the drawing are unchanged. 

If not in a layout, all other layers are turned off instead. 
Off
Turns off all but the selected layers in all viewports. 
Lock and Face
Locks all layers except the layers of the selected objects, and sets the fading for locked layers. 

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