How do you make thumbnails of a image? Do you just have to change the width & height in the code?

NO, NO, NO! Changing width and height does NOT make a thumbnail. It does not change the file size, which is what thumbnails are all about.

Get graphics software. You may already have something installed, but PaintShopPro and Irfanview can be downloaded from .com sites by the same name.

I already have Paintshop Pro. Do I have to resize the whole image?

Is there a way to resize part of the image that I don't know about?

Thumbnails are smaller images that link to the larger ones. You have to resize all of your pictures. Hint: name them similarly for easy coding.

or

for examples.