You can modify parameter values and tolerances in model instances using the tolerance analysis spreadsheet or the connections table.
To modify other geometric or non-geometric data in the model instance, make changes to the master model and then reload the model instance in the assembly or use in-place editing. You must use one of these methods to modify model instances; they cannot be modified directly from the assembly.
Note that layer settings applied to a master model are carried over to the model instance at the assembly level. As with other instance data, you cannot make changes to layers in an instance using the assembly's layer settings; you can make these changes only in the instance's master model. If layers have been hidden in the master model, you can make them visible in the assembly without changing the master model's layer settings by using Show Instance Objects from the Support option under the Help menu.
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