There are a few things you need to know if you want to touch up a photo in Photoshop. First, make sure that your photo is in RGB color space. Second, make sure that the photo is at least 2048px wide and at least 4096px high. Third, make sure that the photo has a resolution of at least 72 dpi. Finally, use the following steps to touch up your photo:

  1. Choose File > Open > Photo from the menu bar and select your image from the list.
  2. Once your photo is open in Photoshop, use the tools on the left side of the screen to touch up its colors and brightness levels. You can also use these tools to fix any errors or problems that may have been caused by digital photography or software processing.
  3. Once you’ve finishedtouching up your photo, save it as a JPEG file and close Photoshop so that it can continue working on other tasks.