1.Click the Save button 
on the standard toolbar.
The Save File dialog box will appear.
The file's current folder, name, description and reference will be visible.
2.If you want to give the file a different name or save it in a different folder, select a different folder and/or type a new name in the File name text box.
3.If you want to make the file read-only, click the tick box next to Make this map read only.
The map will now be locked. This means that if you want to save any further changes to the map, you need to unlock it first. See To save changes to a read only file for details.
4.Click Save.
See also
To save a file for the first time