The Save As command is used for any situation in which a Fidelity Pointwise Project (*.pw) file needs to be saved under a different filename.
In contrast to the Save command, the Save As command will always open a new file browser dialog in which the filename and directory location can be specified. This is very useful for saving multiple iterations of the same project.
Tip: Use Save As to regularly save a new version of your native file. While Fidelity Pointwise does have the capability to Undo undesired modifications, there are still times when you may realize you would really like to go back to an earlier topology you had but long since modified away.