Maintaining Context; User Interaction - Avaya 4600 Series Administrator's Manual

generates font information based on the cookie, form component, or configuration value,
relative to the IP Address of the telephone. Using a static external style sheet makes page
development and testing much easier, since it appears the same way to both the designer and
the reader. Allowing the user to choose a font size forces more work on the designer to verify
that all fixed size items appear acceptably

Maintaining Context

Given the small screen area, a user can become easily lost. Headings are often not in view, and
the user, if distracted by other work, can lose a sense of context. Style sheets can help maintain
this sense of context through color. The <div> and <span> tags are intended to provide page
designer-defined content-based style. By defining classes of <div> tags with various colors and
border styles, the designer provides additional information. However, a significant number of
people suffer from some form of color blindness. Thus, it may be necessary to design pages
both with and without using color styles.

User Interaction

As these design guidelines indicate, HTML forms work reasonably well in the Browser.
However, due to telephone limitations as an input device, keyboard input can be difficult. A
complete keyboard is made available based on the context of mouse selection. When a text
input control is on-screen, the user just clicks the input control. The keyboard appears, with the
browser thrown into a small scrolling area. The input control is roughly centered in the scrolling
area. The user can then press the software keys and the text is shown in the input control.
Simply pressing the Done button dismisses the keyboard, and the input control shows the
newly typed text. While this interaction technically works fine, it can be difficult to type a large
amount of text from a user perspective. So avoid user input unless it is absolutely necessary.
When necessary, keep user input to a minimum.
Design Guidelines
Issue 8 July 2008 173