OVERHEAD TRANSPARENCIES
Overhead transparencies are easy to make and useful for relatively INFORMAL presentations in ROOMS up to 10m LONG.
They are EXCELLENT for overlays and for live illustrations or annotation while speaking.
Often they are used in conferences because the author has not given enough time or effort to make proper slides!
In general, the same production rules apply to overheads but:
- The format is square; 17cm x 17cm, instead of A4
- Modern computers will print straight onto acetate sheets
- Freehand production is tempting but always looks poor
- Overhead projector images are relatively poor, often distorted and cannot be greater than 2m x 2m
- Coloured lines can be drawn easily, but coloured areas need special preparation