LINES & LETTERSTYLES COLOURS & CONTRASTS
Slides should be designed on A3 or A4 paper. The following is based on using A4 paper.
The thinnest line EVER acceptable is 0.5mm, but for simple graphs and diagrams, 3 or even 4mm is a good size.
LETTERS must not be hand-drawn; use dry transfers in a heavy rounded font. The smallest letters MUST NOT be less than 3.5mm high. Most lower case text should be a 5-6mm and upper case at 7-9mm.
A bold RED line on a RED background is INVISIBLE.
First choose your BACKGROUND and then ensure that all the colour combinations used have HIGH CONTRAST.
WHITE on a BLACK background is clear but looks old fashioned and uninteresting. Black on white GLARES.
The BACKGROUND colour should be pleasing to the eye; SKY BLUE is commonly used.