To update a method field
Select the method field in the Catalog of Available Fields dialog and then click the Update button. Alternatively, double-click on the list entry in the Catalog of Available Fields dialog.
The Update Method Field dialog, shown in the following image, is then displayed.
Make the required changes on the dialog. For details about entering specifications, see steps 2 through 6 of the previous subsection, "Creating a Method Field".
Click the Apply button to update your method field. (Alternatively, click the Close button to abandon you changes.)
The method field is then updated with your changes.