How can I change the "Author name", "Email account" and "Copyright" statement on my presentation file?

There are two approaches.

(1) To change the default item for "Author name", "Email account" and "Copyright" statement, you can click on menu item "Tools" -->  menu item "Option" --> "General". The setting will give each presentation a default values for those items.

(2) To change individual settings, please open the project and click on "Attribute" tab to modify it.