How can I create a thumbnail image that is linked to the full-sized image?
A thumbnail image is just a copy of the full-sized image that has been modified to reduce the size of the file. It is linked to the full-sized image with a normal link: 
There are several techniques for reducing the size of the file for the thumbnail image, including • resampling/resizing the image to create a physically smaller image; • cropping the image to remove less significant parts of the image; • reducing the image quality to increase compression ratios; and • reducing the size of the color palette (e.g., converting to greyscale). Thumbnail images can use multiple techniques simultaneously. For example, Jakob Nielsen advocates “Relevance-Enhanced Image Reduction”, which combines resampling/resizing and cropping.
A thumbnail image is just a copy of the full-sized image that has been modified to reduce the size of the file. It is linked to the full-sized image with a normal link: There are several techniques for reducing the size of the file for the thumbnail image, including • resampling/resizing the image to create a physically smaller image; • cropping the image to remove less significant parts of the image; • reducing the image quality to increase compression ratios; and • reducing the size of the color palette (e.g., converting to greyscale). You will need graphics software to create thumbnail images. Freeware graphics utilities will perform all of these functions. Thumbnail images can use multiple techniques simultaneously. For example, Jakob Nielsen advocates “Relevance-Enhanced Image Reduction”, which combines resampling/resizing and cropping.
A thumbnail image is just a copy of the full-sized image that has been modified to reduce the size of the file. It is linked to the full-sized image with a normal link: There are several techniques for reducing the size of the file for the thumbnail image, including • resampling/resizing the image to create a physically smaller image; • cropping the image to remove less significant parts of the image; • reducing the image quality to increase compression ratios; and • reducing the size of the color palette (e.g., converting to greyscale). You will need graphics software to create thumbnail images. Freeware graphics utilities will perform all of these functions. Thumbnail images can use multiple techniques simultaneously. For example, Jakob Nielsen advocates “Relevance-Enhanced Image Reduction”, which combines resampling/resizing and cropping.
