Duplicating an HTML File
HTML files can be duplicated, just as other kinds of document files can: using the File → Duplicate command.
When you duplicate an HTML file, it becomes an Untitled copy of the original file, that is saved in a temporary location. You can edit it freely, but at some point you’re probably going to want to give the duplicate a name and save it in a permanent location. To do this, choose File → Save (Command+S). TypeMetal will prompt you to give the new file a name and choose the folder where it should be saved.