This dialog box appears if a file with the same name already exists at the location specified as the folder in which a page is to be created when the [Finish] button is selected on the last page of the "Create Multiple Pages" wizard.
[Rename Automatically] button
If you click this button, a listed file name is automatically changed to a unique name. This allows the page to be created.
[Overwrite All] button
If you click this button, the new file completely overwrites a file with the same name in the specified folder.
[Cancel] button
If you click this button, no page is created, and control returns to the last page of the "Create Multiple Pages" wizard.