Excluding a Specific Parameter from the Update

To prevent a specific layout parameter from being updated by the Update Layout Parameters command:

From the layout window menu bar, choose Options – Connectivity and click the Parameters tab.
Select Parameters to ignore during generation and update, type the name of the parameter you want to ignore in the field provided, and click Add.
The parameter name is added to the list and will not be updated when you run Update Layout Parameters.
From the layout window menu bar, choose Connectivity – Update – Layout Parameters.
The layout parameters are updated to match the values in the schematic; however, the parameter you specified to be ignored is not updated.

Alternatively, you can update the LAM file to specify the parameters to be ignored.