AutoCAD®
Export Options - DWG / DXF (ASCII) / DXF (Binary) 
File
Export
Set AutoCAD Options
Use this form to perform various tasks while exporting VX
objects to AutoCAD® files.
Complete the form as desired.
Pick
OK to accept the current selections as the new defaults or Reset
to return all selections to their previous defaults.

Reduce Data
Objects are recalculated to within the tolerance specified below and refitted with a lesser number of control points thus reducing and simplifying the data.
Trim Surface
Surfaces will be exported as trimmed surfaces.
Free Surface 
Surfaces will be exported as free-form surfaces.
These tolerance settings govern the accuracy of resulting exported curves and surfaces. The tolerance values are a factor of the Units value currently set in the Part Settings Form (e.g., Value * Units = Tolerance in Units).
UV Curve
Enter the UV Curve tolerance factor for exported data. This tolerance applies specifically to the UV space of resulting surfaces. For example this tolerance will affect the trim loop boundaries of a trimmed surface.
Curve
Enter the Curve tolerance factor for exported curves.
Surface
Enter the Surface tolerance factor for exported surfaces.
Version
Select the version of AutoCAD® to export to. Supported versions include R2.5, R9, R10, R11, R13, R14, or 2000.
Site Specific Header Information (Optional)
All header fields will accept a maximum of 80 characters.
Sending Company - Enter the name of your organization.
Contact Name - Enter your name or the name of the person to contacted for additional information.
Telephone - Enter your telephone number or the number for the contact name above.
Address - Enter the address of your organization.
Project - Enter the project name.
Object ID - Enter the project ID (e.g., part number)
Version - Enter the part version or revision level.
Confidential - Enter any confidential information.
Valid Date - Enter the date until which the part is valid.
Receiver Firm - Enter the name of the organization that is to receive the VDA export file.
Receiver Name - Enter the name of the contact person at the receiver firm that is to receive the VDA export file.
At the Part Level, use this option to export relative to the World or the Local coordinate system. Use the Local Coordinate Frame command to create a local coordinate system of your choice.
This sets the default directory for locating
files to import of the specified type. Pick the folder icon to select
a path from the Directory Browser. The path will
be added to the Default Directory Field. The Default directory
field only applies to the active session while
VX is running unless it is permanently saved using the Save Settings
button on the Import Form.
More about the Default Directory 
All import/export translators have their own default-directory on their options form. If the default-directory is set, then the Directory Browser will always come up in that directory. If the default-directory is not set, then the file browser will come up in the "last visited" directory.
The last visited directory is not unique. There is one last visited for all import translators and one for all export translators. By default, the value in the Default Directory field is set to '.' which means, use the "last visited" directory. The file icon allows you to browse for a directory which will then be the new default. You can set the Default Directory back to "." by selecting Reset on the form.
OK - Accept the current selections and make them the defaults for the active session (see also Default directory above).
Reset - Return all selections to the previous defaults.