Vector graphics are alot different than bitmap, theres is no magic wand. With vector graphics you create objects like circles and use them too build your webpage banner or whatever. Take a look around on this forum especially the xara xtreme (for windows) forum, there are alot of tutorials to get you started.
For bitmap gfx you might want to try Gimp or that-KDE-app-I-cant-remember-the-name-of.
Now I remember, it's called Krita
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