is it possible to make a save button?
It's easy to make the button, harder to support it. How about some more details like a use case where the button comes into play?
one use. the user comes to my site, enters some details in a form, gets passed to a page where their details have been put into a printable format and are presented with two options. print and save.
kinda like going to file and save as.
you can generate pdf and link it to the save button!
The normal way of doing that is to store the information from the form in a database and retrieving that for redisplay later. I.e. the data is saved, not a page. The user can pull the page formatted data up any time later and print it as needed and you have the data for reporting purposes if needed.