STEP 1

Choose an image you want. Clear the margin of the image. If you use PSP to do this, you can drag the mouse pressing right button first to select a area you wish to be reserved. And Then Choose Image/Crop. All space out of the selected area will be cut out.

STEP 2

Fill the background of the image with the same color. CAUTION! The background color you choose MUST differ to any colors contained by reserved object because this color will be covered by background image in your WWW browser later. In this case, I choose pure white to be background.

Choose Colors/Decrease Color Depth/256 colors... to decrease the color depth to 256.

STEP 3

There are two ways to set the background color of GIF89a.

(1) Select Eyedropper tool and right-click on the background. Then choose File/Save As..., press Option button, and check Set the Transparency Value to the Background Color, press OK, and then save the file in GIF89a format.

(2) Select Eyedropper tool and move the cursor to the background of image.gif. See the status bar at the bottom of the main window, and remember the color index value of the background color. In this case, the value is 9. Press Option button in Save As... dialog box, and do the following setting.