Working with images
There are lots of image formats out there but few are common to the web. Image formats most commonly seen are JPEG (files with extension filename.jpg) or GIF (filename.gif). Most images are saved and displayed on the web at 72dpi. That’s 72 dots per inch resolution.
Saving and posting an image at a higher resolution will only use up you customer’s bandwidth and slow page load time.
JPG is used most frequently for images with complex color -- like a photo. An image in GIF format is used often when solid colors are prevalent in the image or a transparent background for part of the image is needed. GIF images can also be animated.
Image file size is incredibly important when it comes to page load time. It’s a tradeoff between quality and page load time. If you need the image to be larger than 600 pixels in width (for example a piano for sale) you should create a web for just that image.
Use thumbnail prints to link to larger pictures. My thumbnail size of choice is 125 pixels wide.
