When you finish working in Photoshop or want to shut down your system altogether, you need to exit the Photoshop program. It takes just a few brief steps, as detailed here.
Save the currently open file . Photoshop will preserve the latest changes to the file. The "Saving a File" section in Chapter 2 will explain how to save a file.
Click on File . The File menu will open.
Click on Exit . The Photoshop application window will close.