Specifies if the lineweight is scaled with the rest of the geometry when a layout is printed.
Supported platforms: Windows only
VBA:
object.ScaleLineweights
Type: Layout, PlotConfiguration
The objects this property applies to.
Read-only: No
Type: Boolean
By default, lineweights are printed at absolute size (not scaled).
The property disabled for the model space layout.
VBA:
Sub Example_ScaleLineweights()
    ' This example reads and modifies the ScaleLineweights
    ' Layout value.
    ' When finished, this example resets the  value back to
    ' its original value.
    
    Dim ACADLayout As ACADLayout
    Dim originalValue As Boolean
    
    ' Get the layout object
    Set ACADLayout = ThisDrawing.ActiveLayout
    
    ' Read and display the original value
    originalValue = ACADLayout.ScaleLineweights
    MsgBox "The ScaleLineweights value is set to: " & originalValue
    ' Modify the ScaleLineweights preference by toggling the value
    ACADLayout.ScaleLineweights = Not ACADLayout.ScaleLineweights
    MsgBox "The ScaleLineweights preference has been set to: " & ACADLayout.ScaleLineweights
    ' Reset the preference back to its original value
    ACADLayout.ScaleLineweights = originalValue
    MsgBox "The ScaleLineweights preference was reset back to: " & originalValue
End Sub
Visual LISP:
(vl-load-com)
(defun c:Example_ScaleLineweights()
    ;; This example reads and modifies the ScaleLineweights
    ;; Layout value.
    ;; When finished, this example resets the  value back to
    ;; its original value.
    (setq acadObj (vlax-get-acad-object))
    (setq doc (vla-get-ActiveDocument acadObj))
    
    ;; Get the layout object
    (setq ACADLayout (vla-get-ActiveLayout doc))
    
    ;; Read and display the original value
    (setq originalValue (vla-get-ScaleLineweights ACADLayout))
    (alert (strcat "The ScaleLineweights value is set to: " (if (= originalValue :vlax-true) "True" "False")))
    ;; Modify the ScaleLineweights preference by toggling the value
    (vla-put-ScaleLineweights ACADLayout (if (= originalValue :vlax-true) :vlax-false :vlax-true))
    (alert (strcat "The ScaleLineweights preference has been set to: " (if (= (vla-get-ScaleLineweights ACADLayout) :vlax-true) "True" "False")))
    ;; Reset the preference back to its original value
    (vla-put-ScaleLineweights ACADLayout originalValue)
    (alert (strcat "The ScaleLineweights preference was reset back to: " (if (= originalValue :vlax-true) "True" "False")))
)