Specifies adaptivity, inclusion or exclusion of document history, 3D snap spacing for the active part, and setting for tapped holes.
Access
Ribbon: Tools tab 
Options panel Document Settings 
. In the dialog box, click the Modeling tab .
The active document type determines the available options.
Compact Model History
Select to purge rollback document history when you save the file. Clear the check box to regenerate the document history to re-enable fast editing performance. Select Manage tab Update panel Rebuild All.
Advanced Feature Validation
Sets the algorithm for computing part features.
When selected, uses a comprehensive compute algorithm that is slower but, can produce more accurate feature results in rare cases. Clear the option to use an optimized feature compute algorithm that significantly improves the performance of Shell, Draft, Thicken, and Offset features.
- To avoid unexpected topological changes, you cannot use a mixture of the two algorithms in one part.
- The Advanced Feature Validation option is not available for legacy parts that the comprehensive algorithm computes.
Maintain Enhanced Graphics Detail
When selected, saves graphics information with the file on disk. Uses this detail in the graphics display if the Application Options Settings - Display tab is set to Smoother.
Tapped Hole Diameter
Controls the model feature size of tapped holes according to the Major, Minor, Pitch, or Tap Drill diameter of the specified thread.
- Apply to legacy tapped holes
-
Updates the setting of existing legacy holes. When you select this option and click OK, all legacy tapped hole features that exist in the document assume the Tapped Hole Diameter setting.
3D Snap Spacing
Sets the spacing between snap points to help with precision when 3D sketching in the active part. Controls snap precision when using Move Feature to drag a feature.
User Coordinate System
Click Settings... to open the UCS Settings dialog box . Set the UCS naming prefix, define the default plane, and select the visibility of UCS and its features.
Initial View Extents
On file creation, sets the initial visible area when creating a model from a template. Configure this setting in your template files to affect new files. You can set the initial height and width of the graphics window.
The units for the Initial View Extents follow the setting on the Units tab for the template.
When you open a part file, the size of the part controls the initial view.
Naming prefixing
Controls the default naming scheme prefix for new solid or surface bodies. The default prefixes are Solid for solid bodies and Srf for surface bodies.
Repair Environment
When selected, automatically checks the model for quality after a manual repair operation, such as a boundary patch. Degrades performance when you select it on complex models.