The Seams page has three tabs; Seams, Standard Length, and Alternates.
Select the size or sizes to edit and click Global Edit at the top.
Using the check boxes and drop down menus choose the options you wish to adjust and hit save changes.
Multi-select edit is available for this list. Select more than one item with CRTL or SHIFT click and use global edit to modify all or some items at the same time.
Standard Lengths can be set using the same method as above. Select the rows and use Global Edit to adjust the length and seam count.
Alternates allow you to make alternate seams and sealants available within the pressure class.