view_layer

view_layer 
{-all layers [ true | false ] | -lpp {s_layerlpp …}} 
-visible [ true | false ] 
[ -norepaint ] 
[ -window_id i_windowID ]

Se ts the visibility of a layer or object. The window is refreshed unless the -norepaint is specified.

`-all_layers [ true \| false ]`
	Sets the visibility for all layer purposes that correspond to physical layers.
`-lpp` {s_layerlpp…}	Specifies the list of layer purposes and objects to assign the color to. Layer purposes are represented as strings in the following format layer`:`layer purpose. For example, `"met3:Blockage"` Object types are similarly represented.
`-norepaint`	Overrides the default action to refresh the window after this command is processed. This option is useful when you are issuing commands from a Tcl script and want to delay refreshing the window until all commands have been issued.
`-visible [ true \| false ]`
	Specifies the visibility of the items in the layer_list. If no setting is specified, items in the list are made visible.
`-window_id` i_windowID	Specifies the identifier of the window to refresh. If this option is not used, the active window is refreshed.

The following example hides the blockage and wire:pin layer purposes of met3.

view_layer -visible false -lpp { "met3:blockage" "met3:wire:pin" }

The following example makes guides and the wire:detail layer purpose of met2 visible.

view_layer -visible -lpp { guides met2:wire:detail }

The following example makes all layer purposes in the active artwork visible.

view_layer -visible true -all_layers