There are a few ways to create circles in Photoshop. One way is to use the Polygonal Lasso tool. To use this tool, you need to select a part of the circle and then press the left mouse button. The Polygonal Lasso tool will then start to draw a line around the selected area. You can also use the Polygonal Marquee tool to select an area and then press the right mouse button. The Polygonal Marquee tool will then start to draw a line around the selected area.