The image below shoes the menu structure for each main function on the main menu. The menus must incorporate the means to return to previous menus, and confirmation menus to ensure the user hasn't performed an action by mistake.
Menu Designs
The navigation system consists of menus and general information displayed on the bottom screen of the device, and contextual instructions displayed on the top screen. The user navigates using the touch screen, or by speaking commands using the microphone.
Below are examples of the menus for the system. The design principles adhered to were as follows:
- Use images as a way to help the user identify common functions (e.g. moving forwards or backwards through pages) and to group sections (e.g. all pages involved with viewing information have the magnifying glass image in the corner).
- Colours had to be consistent across pages, with light colours for backgrounds and buttons, and dark colours for text. Bright colours should be used for emphasis of particular information.
- Text should be clear and concise, with as little technical jargon as possible.
- Buttons should have a 3D effect, which affords pressing and provides better contrast with other elements.
- Clear instructions should be provided on the alternate screen for each page, which can be read out by the device by touching them.
- The user should be able to tell the device to read text on any screen by touching it (or hovering in the case of buttons).
- Pages can be zoomed in and out by placing two fingers on the screen and moving them away from or towards each other (similar to the zooming function on the iPhone).
- The user can also use the microphone to input voice instructions to perform tasks. The instructions section needs to indicate when this is possible and provide examples for the user.
Input menu example:
List example:
Confirmation example:
Notification example:
Info viewing example:
Messages menu:
Settings menu
Instructions example (main menu):
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