I won't be explaining all of the tools but I will explain the one you need to know to start . >the one in black is the eraser tool it will erase what ever you drag it over while clicked >the one in green is the text tool lets you put typed text into an image >the ones in red are the pencil tool and the paint brush tool they're used to make you own draw or add on to pictures >the one in brown is the fill bucket it will fill and area that is inclosed by line with the color of your choice. > the one in blue is the cropping tool it lets you cut the area around whatever you select > the one in the dark red is the free select tool is lets you select a specific area with the mouse it use for things like if you need to only select one oddly shape thing ,like a person, its not as strait forward as the other tools here. It will pretty much make you trace out the area you want to select but it does this through making points around the area and you will place one point at a time until the first and last point meet.
All of the tools spoke about are showen in the slide show below, they are color coordinated with the color the tool is circled in and the color of the dot in the top left corner of the image.