Previously we talked about the palette space of photoshop. This is how you change what palettes appear:
Go to the "Window" drop down menu. The big list, where you see some items with check marks, are your palette options. The ones that have check marks are the ones that are actually showing. I have other palettes in tabs covered by the showing palettes. In my top palette area "Info" is showing and "histogram" and "navigator" are showing only as tabs. This allows you to quickly check different palettes. Now, I'll briefly explain some of the palettes that will be useful to you starting out:
Color - this palette will let you choose what color you are working with. The top box is foreground color, and the box behind is background color. You will work mostly with foreground color. If you click on the box, then you can choose a color.
History - the palette will let you see each change you make, so that you can "step back" to an earlier point if you don't like where you've gotten. Photoshop only stores so much information, so if you've been working for a while, you may not be able to go back to a certain point.
Info - I like to use the info box so I can see how big a selection is. We will talk later about making a selction.
Layers - Layers are the key idea to understanding photoshop. We will talk more about them later as well.