To use a custom transformation, the settings for the transformation must be specified. Any custom item created will only be saved with the coordinate reference system item it is created for.
Available transformations are listed on the left. Settings for the selected transformation are listed on the right. You must enter values and choose units for each of the settings you want included in the transformation.
Procedure
1. Select a transformation from the list on the left.
2. Set the options for the selected transformation.
3. Click Next.
The Select Projection dialog box is displayed.