There are a few things you need to know if you want to make straight lines in Photoshop. First, the pen tool is your best friend when it comes to making straight lines. You can use it to draw a line from one end of the canvas to the other, or even create a V-shape. Next, you’ll need to use the Lasso tool to select a part of the canvas and then use the Polygonal Lasso tool to select all of the points on that part. Finally, use the Move Tool to move those points around so they’re in line with each other.
