Have no text display

Images should have a short text display that pops up when the mouse is moved over the image.

This text is used by some search engines as well as by text readers for visually impaired people. Text display needs to be added to each image.

Are too big

Your images need to be resized so that most people will not see horizontal scroll bars. This will also reduce page load time.

Are slow loading

The color depth and size of images can usually be reduced to make them load faster.

Overlap text and other images

This is usually because of browser-dependant coding or incorrect coding. The HTML and CSS syntax need to be validated. Many times adding a clearing break tag will fix overlapping images.