How can I properly install mitered window trim for a seamless and professional finish?

To properly install mitered window trim for a seamless and professional finish, follow these steps:

1. Measure and cut the trim pieces at a 45-degree angle using a miter saw.
2. Dry fit the pieces to ensure they fit together seamlessly.
3. Apply wood glue to the mitered edges and press the pieces together.
4. Secure the trim to the window frame using finishing nails or a nail gun.
5. Fill any gaps or holes with wood filler and sand the trim smooth.
6. Paint or stain the trim to match the window frame for a cohesive look.