How to add directory index in windows plesk 9.2.1

If you have logged in as admin, select the domain for which you want to make the change or if as a normal plesk user, select ‘Virtual Directories’ under ‘File’ menu. Below is the screen shot:

In the page that you obtain, you will see ‘Directory Properties’ . See below:

Click on ‘Directory Properties’.  The page resulting wil have the options for changing the Directory Index for a domain. See the pic given:

Here you can set the priorities for your index pages.