This dialog displays all item types available for association with specs in Smart Instrumentation and allows you to select and assign a specific item type to the .psr file you try to open in the Page Editor. This dialog only appears if the spec item type is not defined in the source .psr file. You must select the item type that you require and then select OK to open the .psr file as a spec page in the Page Editor.
After you select the item type, it becomes permanently associated with the current spec page. If you must change the item type, you need to use the Open File option in the Page Editor again, select your .psr file, and then, select the appropriate item type.