Information can be entered in the Project Data dialog box at any time (even after your drawings have been created). Click the Project Data icon on the "Standard" toolbar.
The Project Data dialog box appears. Enter the project information.
The drawings (from the model) can be updated using the "Update page header" icon on the "Numbering, drawing" toolbar:
Result: The content of your drawings is updated and contains the latest information entered in the Project Data dialog box: