I read through the peoplebooks in which it is mentioned if we select the option "Disable Display in Modal when not launched by DoModal peopleocde" the secondary page appears as a modal page over the primary page and not in a new window.

But irrespective of selecting or deselecting the option my secondary page is always shown in a new window. I am working on PeopleTools 8.53. Please suggest.

Also note that I have used DoModal Function to call secondary page.