To Freeze and Thaw a Layer in a New Viewport (AutoCAD Mechanical Toolset)

1. Click the Layout tab to switch to the layout mode.
2. Click Home tabLayers panelMechanical Layer Manager. Find
3. In the row corresponding to the layer you want to freeze/thaw, click in the New VP Freeze column to toggle the current status.
4. Click OK.

Note: The Freeze in New VP column is available in Layout mode only.