Model Settings dialog box
The majority of settings for the current project are accessed from the Model Settings dialog box.
Location
On the Home ribbon tab, click 
Model Settings.
Content
See: Model SettingsAfter adjusting the settings, do one of
the following:
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To apply the changes to the current project: click OK
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To save the changes back to the active settings set for future use: click Save...
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To cancel the changes: click Cancel
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To revert to the model settings specified in the active settings set: click Load...