NAVAIR INSTRUCTION 4120.11 From: Commander, Naval Air ...

NAVAIRINST 4120.11
A.4.16 User interaction and features.
A.4.16.1 General user interaction. General user interaction
capabilities for interactive presentation of IETMs are functions
needed to control a screen display and functions, which are used
to interact with the IETM. Also, functions such as a method to
obtain information for example help, next and back. The user
interface needs to be easy for the technician to understand and
navigate. The IETM should be intuitive enough to aid the
technician through maintenance tasks and supply all available
information necessary in an efficient manner. The IETM should
also be consistent throughout the entire IETM presentation
process.
A.4.17 Graphic guidelines. IETMs rely heavily on graphics to
communicate to the technician. Consequently, the construction
of high-quality graphics represents one of the most stringent
and important concerns in IETM preparation. Graphics should be
as simple as possible and displayed in a format that conveys the
complete thought to the user. When graphics accompany text,
they should be designed so that they illustrate and are
consistent with actual points.
A.4.18 Graphic display. Graphic displays should be consistent and
maintain a standard format, for example level of detail,
relationship to text and other graphics, labeling and callout
labeling. Consistency in the display of graphics should allow
the user to focus on the graphics rather than being distracted
or confused by changes in format. Graphics should provide only
the data necessary for user tasks.
A.4.19 Display characteristics/colors. When developing an IETM,
developers should use the MIL-HDBK-511. This IETM developers
guide further refines the information within that documents.
A.4.20 Text colors / background. The text should be black
(#000000 or #000033) except as noted elsewhere. Background
should be white (#FFFFFF) except as noted elsewhere. This aids
printing without loss of content. There may be operational
exceptions such as night ops and where color has special
meaning. Use of the safe color palette (see Inner Shell Colors
in the previous section) avoids surprises upon fielding to 8-bit
devices such as PDAs.
A.4.21 Standard text/fonts. Table A-1 provides guidelines for
font standardization of IETMs delivered to the end-user.
Enclosure (4) 44