Metadata Menu>Edit Metadata Presets.
In the ensuing dialog box, check which items you want to include in your preset and enter the relevant information. When you are done, click Done and you will be prompted with the option to save the settings as a new preset. Enter the name you want, click Create and you are done. You can then apply that preset automatically on import, or retrospectively by selecting images in Library and then in the Metadata pane in the right-hand panel click the two small arrows in the "Preset" box (top entry below the Metadata Pane header)....the list of available presets will drop down, click on the one you want to apply.
