Adding already created pages to menu

Hi,

I used a template to make my site and have pages that are not in the top menu. How do I add them to the menu?

The only option seems to be to create a new menu page and redo it.

I started in ADI and moved to the more fancy editor. Should I now stay in this version - the message said any updates made in the this would be lost of you go back to ADI.

New to this!

Thanks