It is best to keep line length on Web pages to somewhere between 40 and 60 characters. Graphics should be included on an instructional Web page only if they help the viewer in orientation or navigation or in understanding the content more fully. Even instructional graphics should be used carefully. Aside from the fact that lots of images can be distracting, they can also take a long time to load. As noted earlier, one option is to link text to graphic files rather than placing the graphics on the same page.
Page size involves both page length and file size.
Hall, citing several studies, recommends minimum scrolling, and therefore short pages. From an instructional point of view, it is worth considering how much information it is reasonable to include on a page. Another issue with long pages is slow loading time, although text pages do not usually take as long to load as graphics pages with large graphics files. Finally, designers should remember that many students like to print out Web pages so that they can read them at their leisure, review them, or take notes on them. It is easier to print out a long page than a series of short pages.