2012

be undone with Layer Previous. You can use LAYERPMODE to suspend layer
property tracking when you don't need it, such as when you run large scripts.
There is a modest performance gain in turning off Layer Previous tracking.
Layer Previous does not undo the following changes:
■ Renamed layers. If you rename a layer and change its properties, Layer
Previous restores the original properties but not the original layer name.
■ Deleted layers. If you delete or purge a layer, using Layer Previous does
not restore it.
■ Added layers. If you add a new layer to a drawing, using Layer Previous
does not remove it.
Changes in the Layer Properties Manager can be grouped by enabling Combine
Layer Property Change option in User Preferences tab in the Options dialog
box. Layer creation and deletion will be tracked in the Undo list as unique
items.
To change the layer of one or more objects
1 Select the objects whose layer you want to change.
2 Click Home tab ➤ Layers panel ➤ Layer Properties
3 In the Layer Properties Manager, select the layer that you want to assign
to the objects.
4 Press ESC to remove selection.
To change the default linetype assigned to a layer
1 Click Home tab ➤ Layers Panel ➤ Layer Properties
.
2 In the Layer Properties Manager, select the linetype for the layer you want
to change.
3 In the Select Linetype dialog box, if the linetype you need is not displayed,
click Load and use one of the following methods:
■ In the Load or Reload Linetypes dialog box, select one or more
linetypes to load. Click OK to return to the Select Linetype dialog box.
526 | Chapter 16 Control the Properties of Objects