Re: Good grief, my logo....
I think she means the banner in her sig. But Al-Dog's instructions are essentially the same for that, except if you're not sure how many pixels wide you want, you can input the width in cm or inches, I think in the lower portion of the box (I think it's "Image Dimensions"). But be sure to click "constrain proportions," that's what will keep the height proportional to whatever width you select.
"O fan from me the witless chaff of such a writer!" --Shakespeare