There are a few different ways to add a person into a photo. You can use software like Photoshop or GIMP, or you can use an online tool like Fotor. If you're using Photoshop or GIMP, you can use the clone stamp tool to clone part of the photo and then paste the person in. You can also use the selection tool to select the person and then copy and paste them into the photo. If you're using an online tool like Fotor, you can use the photo editor to add the person to the photo. You can either use the selection tool to select the person and then add them to the photo, or you can use the clone stamp tool to clone part of the photo and then add the person.