Netscape Composer allows you to change the size of your image right in the image attributes window, on the “Dimensions” tab. Normally, you don’t want to do this. If you change the size of the image so that it’s larger than it “really” is, the quality of the image will suffer considerably. If you change the size of the image so that it’s smaller than it really is, you are foregoing considerable savings in file size. As long as the image only appears once on your web page, you should use your image editor to change the dimensions of any image you use.
If the same image appears twice, and you want it to appear with different dimensions each time, then it makes sense to use the larger version and re-dimension it to display the smaller version(s) also. Since it is the same image with the same URL, web browsers will only download it once.
When you resize the image in Composer, you almost always want to keep the “Constrained” button checked. This keeps you from accidentally resizing the image more in one direction than the other. It keeps the image proportional. Without this, your images will likely end up too tall (making everyone look thin) or too wide (making everyone look wide).
