Turn Layers On and Off

Turned-off layers are regenerated with the drawing but are not displayed or plotted. By turning layers off, you avoid regenerating the drawing every time you thaw a layer. When you turn a layer on that has been turned off, AutoCAD redraws the objects on that layer.

To turn layers on and off, use the LayerOn property. If you input a value of TRUE to this property, the layer is turned on. If you input a value of FALSE, the layer is turned off.

Turn off a layer

This example creates a new layer, adds a circle to the layer, then turns off the layer so that the circle is no longer visible.

Sub Ch4_LayerInvisible()
	' Create a circle
	Dim circleObj As AcadCircle
	Dim center(0 To 2) As Double
	Dim radius As Double
	center(0) = 2: center(1) = 2: center(2) = 0
	radius = 1
	Set circleObj = ThisDrawing.ModelSpace. _
						AddCircle(center, radius)

	' Create a new layer called "ABC"
	Dim layerObj As AcadLayer
	Set layerObj = ThisDrawing.Layers.Add("ABC")

	' Assign the circle to the "ABC" layer
	circleObj.Layer = "ABC"

	' Turn off layer "ABC"
	layerObj.LayerOn = False
	ThisDrawing.Regen acActiveViewport
End Sub