How can I effectively route a rabbet inside a frame for a clean and precise finish?

To effectively route a rabbet inside a frame for a clean and precise finish, follow these steps:

1. Measure and mark the desired depth and width of the rabbet on the frame.
2. Secure the frame and set up the router with a rabbeting bit that matches the dimensions.
3. Start routing from the edge of the frame, moving in a smooth and steady motion.
4. Work in small sections, making multiple passes if needed to achieve the desired depth.
5. Use a straight edge or guide to ensure a straight and even cut.
6. Check the rabbet for any rough edges or imperfections and sand as needed for a smooth finish.