There are a few ways that you can edit a line in a photo. One way is to use a photo editing software, like Photoshop, GIMP, or Paint.net. Another way is to take a photo of the line you want to edit, and then use an online photo editor, like Pixlr.
If you're using Photoshop, you can use the pen tool to draw a line on the photo. Then, you can use the clone stamp tool to copy another section of the photo and place it over the line. You can also use the eraser tool to erase the line.
If you're using GIMP, you can use the path tool to draw a line on the photo. Then, you can use the clone tool to copy another section of the photo and place it over the line. You can also use the eraser tool to erase the line.
If you're using Paint.net, you can use the pen tool to draw a line on the photo. Then, you can use the clone stamp tool to copy another section of the photo and place it over the line. You can also use the eraser tool to erase the line.