At regular intervals you should save your publication. If you want, you can also make a copy of your publication using the Save As option in the File menu.
Click on the File menu, then select the Save option or simply click on the save 
button on the Main toolbar. This will open the Windows Save As dialog box.
Find the folder you want to save the current publication in and type a name for the publication in the File name box on the Save As dialog.
Click on the Save button to save your publication.
Click on the File menu, then select the Save option or simply click on the save 
button on the Main toolbar.
Click on the File menu, then select the Save As option. This will open the Windows Save As dialog box showing the filename for the current publication open in Opus.
Type in the new name for the publication in the File name box in the Save As dialog box. If you want you can locate a different folder on your computer where the new publication should be saved.
Click on the Save button to save the new copy of the publication.
Note:
Every time you save a publication, Opus will automatically save resources used in your publication in a Resource folder – see Consolidate Resources for more information.