When you want to cartoonize a picture in Photoshop, there are a few things you need to know. First, the picture must be in RGB color space. Second, the image must be at least 2048px wide and have a resolution of at least 72dpi. Third, the image must be in JPEG format. Finally, the file size must not exceed 10MB. To begin, open Photoshop and create a new document by clicking on the New button on the left-hand side of the screen. In this document, name it “Cartoon Picture.” Next, select the RGB color space and click on OK. Next, set up your image’s dimensions by clicking on the Width/Height button and then selecting 72dpi as your resolution. Finally, click on OK again to close out your document. Now that your document has been created, it’s time to start drawing! To start drawing your picture, select any of the tools at the bottom of the screen and then drag them up into your document so that they are located at the top of your screen. Once they have been dragged into place, release them so that they can be used again later. Now that you have started drawing your cartoon picture in Photoshop, it’s time to finish up by saving it as a JPEG file. To do this, select File > Save As… from within Photoshop and then enter Cartoon Picture into the filename field.