Adding pages without mucking up the Nav Bar

Hi,
I'm having a 'Senior moment' because I've just done this but I can't remember how to do it again!!!!
I need to duplicate a page without messing up my Navigation Bar.
Basically I need to add some pages to link my drop down links to but every time I hit add new page or duplicate page it alters my navigation bar with the name of the new page whereas I want the Nav Bar left alone to link the Drop down menu to the new pages.
As I said I've just done it once but can't seem to do it again.
Thanks
Paddy

Double click on the nav bar to open the Nav Bar Properties menu. Delete the pages you don't want to appear on the nav bar.

This does not delete the pages, it just removes them from the bar itself.

You can add pages to a sub menu. Click Help in the Nav Bar Properties menu for more details.

Thanks so much - got it sorted with your help.