First you should learn the basic ins and outs of the Layers box, which for all extensive purposes will be your new best friend. If you don't see a menu with a "Layers" tab, hit Window in the top navigation bar, and scroll down to Show Layers. This will create a box with three tabs: "Layers", "Channels", and "Paths." For now, all you need to worry about is the "Layers" tab. Think of Layers as objects or puzzle pieces. The advantage of separating key elements of your work into different layers is that you then have the ability to edit one specific part of a piece without any effect to the other elements. For example, if you are coloring a black and white piece of line art, and you set the lineart on the TOP layer where the white areas are transparent, and have the color on the BOTTOM layer. You can edit the bottom layer without ever having to worry about coloring over the precious guides of the line art. When you create a new document â in this case you want the document size to be roughly the size of your sig â the only layer you will see is the Background. All you have to do to include pictures from another source is to open that source in another window and copy and paste. To start, just use the rectangular marquee tool to draw a box that contains all the pieces of the pic you want, copy it (either with ctrl+c or "Edit, Copy" in the nav bar) and paste it into your sig document. Photoshop puts it in a new layer. From here you need to either erase the excess of the image, or use the lasso tool to cut it out. Whichever you do, take it in small increments, because you can only "undo" so far, and it will benefit you in the long run if you don't bite off more than you can chew.