There are a few ways to straighten curved text in Photoshop. One way is to use the Curves tool, which is located in the Tools palette. The Curves tool can be used to straighten text, make it more even, or change the curvature of text. Another way to straighten curved text is to use the Levels tool, which is located in the Levels palette. The Levels tool can be used to adjust the brightness and contrast of text.