VISIBILITY, SHAPE & SIZE, INFORMATION & CLARITY
If an image is clear at 1.5m, the equivalent slide will be clear in a reasonably designed theatre.
A slide is normally an accompaniment to the spoken word and does NOT NEED to be totally self-explanatory.
Most slides are on display for 1-2 minutes, during which the speaker will use 90 - 150 words. 10-20 CLEAR words on the screen is ALL the audience can absorb whilst LISTENING to the speaker.
Use SIMPLE, SHORT words and avoid detail. Include nothing unnecessary - except perhaps a title which viewers expect.
DO NOT REPRODUCE REPORT diagrams, tables, graphs or computer prints. NEVER copy machine diagrams.
ALL these sources must be EDITED and REDRAWN.