Netscape Editor makes provisions to Save your Web Page Documents.
It is "just like" Saving Documents in "other" software.

From the Netscape Navigator Gold, BROWSER Toolbar...,

"Click-on" File, then choose Save.

Netscape will Save your file!

Of course..., you can use Save As to "change the name of the file"!

Just like Word Processor Files..., it is important to Save your Web Page(s) OFTEN..., (while you are creating them). Perhaps you might have "various generations" (versions) of the "same page". In case you need to Go Back To a previous revision.