To recombine materials after changes have been made to material grades, use the Recombine Grade command in the Combining Run Results dialog box.

1. In the Combined navigation tree, click the + sign under a material shape to show available material grades.
2. Click a material grade to select it.

   Only the selected material grade is shown.

3. Click the items that you want to recombine to select them.

   To select multiple items, hold down Ctrl.

   To select a range of subsequent items, hold down Shift.

4. Click the Combining Run ribbon tab.
5. On the menu, select Recombine Grade.
6. In the first confirmation dialog box, click Yes to recombine the selected grade.
7. In the second confirmation dialog box, click Yes to save the previous combining run or No to recombine materials without saving the combining run.

   By saving the previous combining run, you can compare the differences between the previous combining run and the new one.