5.6.3.10 CRT Image Linearity
The display should be free of geometric distortion.
5.6.4 Coding and Highlighting
5.6.4.1 Highlighting Selected Data
When a user is performing an operation on some selected display item, that item should be highlighted.
5.6.4.2 Flash Coding
Flash Coding should be reserved for Alarms.
5.6.4.3 Redundant Color Coding
Color coding should be redundant with some other display feature, i.e. add color coding after displays have already been designed as effectively as possible in a monochrome format.
5.6.4.4 Easily Discriminable Colors
When selecting colors for coding discrete categories of data, those colors should be easily discriminable.
5.6.4.5 Minimum Color Differences
When color coding is used for discriminability or conspicuity of displayed information, all colors in the set should differ from one another by a minimum of 40 ΔE (CIE L*u*v*) distances.
5.6.4.6 Establishing Standards for Shape Coding
When shape coding is used, codes should be based on established standards or conventional meanings.
5.6.5 Display Elements
5.6.5.1 Font Style
A clearly legible font should be utilized. Fonts should have true ascenders and descenders, uniform stroke width, and uniform aspect ratio.
5.6.5.2 Character Size
The height of letters and numerals should not subtend less than 16 minutes (4.7mrad) of visual angle.
5.6.5.3 Meaningful Abbreviations
When abbreviations or acronyms are used, they should be meaningful, in common usage and kept to a minimum.
5.6.5.4 Units of Measurement
The units of measurement (volts, psi, inches, etc.) should be labeled.
5.6.5.5 Appropriate Use of Icons
Icons should be designed to look like the objects, processes, or operations they represent, by use of literal, functional, or operational representations.
5.6.5.6 Representation and Discrimination
Each icon or symbol should represent only one object or function and should be easily discriminable from all other icons and symbols.
