Select To Project when creating a document for a specific project. Open an existing project by clicking the Select button, or create a new project by clicking the New button.
Fill in the part's archives data by clicking Arc. Data.
If you want to add the model to an item, click Item Data. Fill in the data in the Item Data dialog box.
If you want to create a new part as a file, unselect To project, and select Add to file. Select the file's location by clicking Browse.