Creo Advanced Framework > Using Creo Advanced Framework > Working with Automatic UDFs > To Create a Creo Parametric UDF to Use with an Automatic UDF
  
To Create a Creo Parametric UDF to Use with an Automatic UDF
1. Create a UDF in Creo Parametric with a single coordinate system as 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 and define the variable dimensions of the UDF. Use the same dimension names as those 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 GIF image with 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 and add 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.