Provide a clear navigation model
Core features should be available from the main view.
Limit the number of menu choices – make them context specific.
Navigation model should be focused on the user’s main tasks.
Advanced functionality should be hidden from novice users.
Use familiar language
Use terms that are familiar to the user and relates to the users’ tasks and goals.
Terminology should be consistent with the Series 60 UI style.
Localize: target users’ native language should be used.
Hide the complexity of connectivity
Short network coverage problems should not cause loss of users’ work or stop them from working.
Connection status should be displayed clearly.
Synchronization should be automatic but under user control.
Provide useful feedback
Let the user know immediately if an action was successful or not.
If processing takes more than 0.5 seconds, indicate that something is happening, for example, with a progress bar.
Be consistent with controls
Minimize errors and the need for learning by using softkeys according to the Series 60 UI style.
Build shortcuts for advanced users, use shortcuts similar to other applications.
Make sure that the most important actions are also available in the Options menu.
Provide a simple Options menu
Navigation key default action(s) should also be available in an Options menu.
Sort items in the Options menu according to the Series 60 UI Style Guide.
Main actions should be available without scrolling.
Use tabs wisely
The most essential functionality should be provided in the first tab. Underlying tabs can be used to hide advanced functionality.
If more than five tabs are needed, use a list for accessing the tabs (see the Settings application).
Text is preferable to icons in tab titles.
Make information entry easy
Instead of text entry, prefer alternative forms of information entry, such as selecting from a list or capturing images.
Offer reasonable default values.
Focus should always be easily movable with the arrow keys.
Display information clearly
Display the most relevant information first.
Essential information should not be displayed with icons only.
Use colors and symbols for highlighting and grouping items.
Context-sensitive help should be provided in the application.
Give step-by-step guidance when the user is accomplishing difficult tasks.
More detailed help should be provided on a Web site or in the user guide.