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5. COMMAND BUTTONS
In CBA devices, there are some common rules for the positioning of the commands. The consistency between CBA
texts across different applications makes the UI easy to learn and it also prevents errors.
Buttons Command types Example commands
Button1
The most frequently used command is placed on the
uppermost button. For better usability, the Shortcut
'Enter' can be assigned to this command. This feature
is indicated by underlining the command. In dialogs,
this command is control-sensitive, i.e. the command
may change according to the position of the focus.
Open / OK / Select / Call / Connect / Send / Start
/ Change / Set / Yes
Button2
This button may include the following kinds of
command:
- one of the most frequently used commands
(the most important command should reside
in Button1)
- commands which help navigation inside a
view (e.g. change from one window to
another)
- commands which enable switching between
different views inside an application
- commands which open an options dialog
Edit / New / Add / Change window / Options
Button3
This button can include the same types of command
as Button2. Also, when the CBA includes a command
that deletes or performs another 'destructive'
command, this type of command must reside in
Button3.
New / Delete / Remove / Deselect / Options
Button4
- closes applications and dialogs
- cancels confirmation notes
- generally, Button4 provides the means to 'go
back safely'
Close / Cancel / Hang up / Disconnect / No
Table 4: Rules for the positioning of commands.
- Multi-level CBA commands should be avoided: a command in the Command Button Area should not open another
set of commands. For example, avoid commands like ‘‘Write message’’ in a CBA button which will change the CBA
command set to ‘‘Write mail,’’ ‘‘Write fax’’ and ‘‘Write SMS.’’
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