MIL-DTL-87268D
3.4.2.4.6.1 Scroll functions. When required, the capability shall exist to scroll graphical information through
the use of the SCROLL UP, SCROLL DOWN, SCROLL LEFT, and SCROLL RIGHT functions. When
the graphic displayed exceeds the size of the data pane, it shall scroll and a visual cue shall be
provided (vertical/horizontal scroll bar).
3.4.2.4.6.2 Zoom functions. The capability shall be provided to enlarge or reduce the displayed graphical
information. Graphic enlargement shall be provided by activating a ZOOM IN function. Graphic reduction
in size shall be provided by activating a ZOOM OUT function. The size of the data pane shall not
change as a result of using the zoom functions.
3.4.2.4.6.3 Center. The capability to activate a CENTER function shall be provided. The CENTER function
shall relocate the center of a graphic to the point the cursor indicates, without scrolling.
3.4.2.4.6.4 Full screen. The capability to enlarge a graphic to the full size of a client area by activating the
FULL SCREEN function, shall exist.
3.4.2.5 Tables. Tabular information shall be displayed as cells of textual information or a graphic. When
tables contain textual elements, those elements shall conform to the requirements herein, for textual
information. Graphical elements within a table shall conform to the requirements herein, for graphic material.
3.4.2.5.1 Display of tables. Tables shall be displayed in a left-to-right, top-to-bottom array of cells. Tables
shall have column headers and, if applicable, row headers.
3.4.2.5.1.1 Justiication. Lists of alphabetic data shall be vertically aligned with left justiication. Numerical
data shall be justiied with respect to a ixed decimal point. In cases where there is no decimal
point, the numerical data shall be right justiied.
3.4.2.5.1.2 Column spacing. Consistent column spacing shall be maintained within a table. When more than
one column of data is displayed, suficient space shall be provided to clearly distinguish the data.
3.4.2.5.1.3 Row spacing. For dense tables with more than ten rows, a grouping feature, i.e., a solid or
blank line shall be inserted after every ifth row.
3.4.2.5.2 Highlighting. The capability to highlight selectable text shall exist within a table. Tables shall
display active selections as highlighted areas and the entire highlighted area shall be sensitive to selection by
the pointing device. All selectable areas shall be displayed and visually highlighted before selection.
3.4.2.5.3 Selection of tables. The capability to select an individual highlighted cell displayed in a
table shall be provided.
3.4.2.5.4 Scrolling of tables. The user shall have the capability to manipulate displayed tables by activating
the SCROLL function if the table exceeds the size of the data pane. When a table is scrollable, the table
headers shall not scroll within the pane. The capability to scroll tabular information a row or column at a
time, through the use of the SCROLL UP, SCROLL DOWN, SCROLL LEFT, and SCROLL RIGHT
function, shall be provided. When the table displayed exceeds the size of the data pane, it shall scroll and
a visual cue shall be provided (vertical and horizontal scroll bars).
3.4.2.6 User prompts/questions. User prompts shall be displayed as dialogs (see 3.4.1.4.5). Prompts shall be
used to obtain any information required by the IETM. Prompts shall be presented as questions.
3.4.2.6.1 Display of user prompts. A standard symbol or layout shall be used with prompts to indicate that
an explicit response, e.g., entry, is required. The symbol or layout used shall be reserved only for this
purpose. The data entry area shall be displayed in the immediate vicinity of the prompt or question.
3.4.2.6.2 Manipulation of user prompts. When responding to multiple prompts in a single section of a
procedure, the capability to change a previously entered response to the extent that the change does not
alter the logic of the procedure shall be provided. When a response is changed to any given prompt,
access to all of the current entries for that prompt shall be provided.
3.4.2.7 Audio controls. When either verbal or non-verbal audio signals are presented, the capability to
repeat the audio signal shall exist. Audio on-off and volume shall be provided.
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