When you save a page that has been saved once before, the existing file is overwritten with the new version.
1. Click (Save Icon)
=>When you modify an existing page and then save it, the new version overwrites the existing file.
When you attempt to save a newly created page, the "Save as" dialog box appears. Specify a name for the file and then click the "Save" button.
You can also assign a new name to a page that has been saved once before, as follows.
1. From the menu, select "File"->"Save as"
=> The "Save as" dialog box appears.
2. Specify a name for the file, and then click the [Save] button.
Hint
An edited page (that is, a page that has been modified but not yet saved) is indicated by "*" in the window title.