Example One Low Contrast This is hard to read as the words and background blend in!

Example Two Red and Green These are the same if you are colour blind!

Example Three Black on White Can cause glare, eyestrain and headaches

Example Four High contrast without a glare.

ART! Even with well chosen colours, overcrowding can distort the message! And word art can be difficult to read (see below)

Example Four This is font 12 Arial. The heading is 14. While these work when reading from the screen, they will be difficult to read from the back of a lecture hall. This is Font 24. Much easier to read at a distance.

Bullet Points It is good to have six bullet points maximum per slide. When you use more than this your page will become clustered. It will no longer be well spaced out, It will be difficult to read, It will look wordy, and the font size will shrink And will be off putting to read. Consider that this page is clustered with only seven bullet points!