There are a few ways to make curved lines in Photoshop. One way is to use the Curved Lines tool. The Curved Lines tool is a filter that allows you to make curved lines by dragging and dropping the line into a position. You can also use the Curved Lines tool to create curves in your images. Another way to make curved lines in Photoshop is to use the Pencil tool. The Pencil tool allows you to make curved lines by drawing a line between two points on your image.