1. Create a UDF in Creo Parametric with a single coordinate system for reference.

2. Save the dimensions for use as variable UDF dimensions.

3. Create the UDF as a standalone UDF using Creo Parametric functionality with no reference parts. Enter REF_CSYS for the coordinate system, then define the variable dimensions of the UDF. Use the same dimension names as those you defined in step 2.

4. Complete the UDF definition.

5. Copy the UDF file (<UDF-name>.gph) to folder <AFX installation directory>/parts/auto_udfs.

6. Create a 150x150 pixel PNG image with the same name as the UDF, and save it to <AFX installation directory>/parts/auto_udfs.

7. Edit the <AFX installation directory>/parts/auto_udfs/sel_list.txt file, adding a line for the <UDF name> udf at the end of the file.

8. Save the file and restart Creo Parametric with Creo Advanced Framework.