Using a packer will depend on the specific type of packer you have and your individual needs and preferences. However, here are some general steps you can follow to use a packer:

1. Choose the right packer: There are many different types of packers available, so it's important to choose one that meets your needs and feels comfortable to wear. Consider factors such as size, shape, material, and attachment method when choosing a packer.
2. Clean your packer: Before using your packer, make sure to wash it with soap and water or a specialized toy cleaner to ensure it is clean and free of bacteria.
3. Position the packer: Depending on the type of packer you have, you may need to attach it to your body using a harness or simply place it in your underwear. Experiment with different positions and attachment methods to find what works best for you.
4. Adjust as needed: Once your packer is in place, make any necessary adjustments to ensure it feels comfortable and looks natural. You may need to adjust the position or use additional padding to achieve the desired effect.
5. Practice: Using a packer may take some practice, so don't be discouraged if it doesn't feel comfortable or natural at first. With time and practice, you can learn to use your packer confidently and comfortably.

It's also important to note that using a packer is a personal choice, and not everyone will choose to use one or feel comfortable doing so. If you have any questions or concerns about using a packer, consider talking to a medical professional or a therapist who specializes in gender identity issues.