I suggest to sort the content of this article on hand the steps of creating and embedding screenshots. On this way it will turn into a howto, which can be followed by a beginner. I allowed myself to copy this article into my namespace and apply my desired changes there. Basically, the suggested tools are introduced, followed what should be chosen as the "model", technical aspects of the file, and last the upload/naming and embedding. My changes can be seen there as well. User:Chick'n'Duck/Editing guide Screenshots