Right-click in the Main Table List View, and then click Add Standard Size. For mainsize instead of standard size, see Add MAINSIZE.
The Select size from template dialog box displays.
You cannot add standard sizes if all standards are already included in the selected table.
Select the sizes that you need to add, and then click OK.
Use the Select / deselect all check box to select or clear all values.
The values selected are displayed in the Main Table List View.
Click File > Save to save the changes to the catalog.