By default, PDF2XL is set up to convert all the pages in your document.
You can see the pages that will be converted on the Home tab and the Convert tab.
In this example, all pages of this 114-page document will be converted:
If you only want to convert a specific range of pages, you can input the range from the beginning page to the final page.
This example will convert all the pages from 7 to 80:
You can also select multiple ranges or specific pages.
This example will convert pages 1,2,3,5,6,7,12 (notice how it skipped pages 4,8,9,10, and 11?):
Click on the little paintbrush icon to open the Convert Pages dialog. Here, you can also select your page range options and choose the default setting: