In order to physically engage the hand, eye, and brain, it is essential to work by hand. It helps us to observe, and recognise elements we may not have seen before, to actually see what is there, rather than what we think is there. Think visually. Henry Charles Beck's london underground could be described as a type of mind map, working out how best to display the aspects of the underground system.
"Henry Beck designed the first diagrammatic style tube map in 1933." Beck would take sections from maps to help him rework the system, as it was originally displayed by geographically placing the stops. 'This is a section from a map that was never issued.' It was found that geographic accuracy was not as important as how to get from one station to the other and how to change.
Today's underground map. Uses colour to differentiate between service lines, and circles to show which lines intersect for changes. The design is clear and very legible which makes it accessible for a wide audience.
Principle 2- Utilise your brain