Use the Select revision option to choose another revision of the selected part. The Isah info bar (immediately above the tabs) shows the revision and reference date the calculation details displayed relate to. Any change to the revision or reference date will be reflected in the information shown on the info bar. The calculation details relating to that revision are displayed on the screen.

Whether you choose a different revision or a different reference date on the form depends on whether you use part revision management:

• If you are using part revision management, the reference date is the start date of the selected revision. This reference date cannot be changed.
• If you are not using part revision management, the reference date is the current date. You can change the reference date if required.