creating a page from existing template, to refresh your view you may check with the corresponding links Link: 1, 2, 3
In this example we are learning how to create a page from an existing page, and adding the URL from the new page at master.dwt. Note it is master.dwt to be edited not the default page. 
Select an existing page from the site, and right click on it, choose New From Existing Page,

that creates another page, as shown below.

save this page as

Now we are going to add the link to the recently created web page; it would be easiest to copy and paste the code as shown below in mastyer.dwt. Do necessary editing the links

now create a link

save dwt file

when you choose Yes, on the screen you may view the updated files.

The default and the other pages are updated too. You may have save those page before you can view the recent changes.

See on the run time