If you want to take a screenshot on your Mac, there are a few steps you need to take in order to do so. First, open the System Preferences and click on the Screenshot button. Next, select the type of screenshot you want to take. You can choose either a JPEG or PNG image. Once you have selected the screenshot type, click on the TakeScreenshot button. Now that you have taken a screenshot on your Mac, you will need to save it somewhere. You can save it to your Desktop or any other location you like. Once you have saved the screenshot, open it up and use whatever tools or applications you would like to use to edit it. For example, if you want to change the color of the image, you can do so by editing its file extension and then saving it again as a PNG or JPEG file.