Define conventions for screens

Colors, background colors, and fonts

Equipment symbols

Position and status of valves

Position and status of pumps and motors

Information to be included on each screen such as a company logo.

Present the same information and basic functions in the same places on each display to make it easier for users to find elements as they navigate from screen to screen.

Use the standard and easily recognizable symbols from the

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library of predefined graphics. For example,

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contains standard ISA symbols for tanks and valves.

Place the same kind of buttons in the same positions on each screen, and label them consistently. For example, if there is a Start button in a certain position in one screen, do not put a Stop button in the same position on another screen.

Use standard, clear terminology. Avoid abbreviations or acronyms.

Use colors with recognizable meanings. For example, in Europe and North America, the colors red and green often mean stop and start. Keep color meanings consistent by assigning red only to Stop buttons, and green only to Start buttons.

On each screen, include only necessary information. Create pop-ups to provide more detailed information.

For touch screens, place important buttons where they will not be blocked by a pop-up. Also ensure that buttons are large enough and spaced far enough apart for users to touch them easily, even when they are wearing work gloves.

Ensure there is always a clear way to move between displays.

For text, use high-contrast color combinations such as yellow on blue or dark text on light-colored backgrounds.