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Design rule 3
•Allowing users to be in control of the
software
•Application of corollary 1
•User should control the software instead of
software controlling the user
Ways to put users in control
•   Making the interface forgiving
•   Make the interface visual
•   Provide immediate feedback
•   Avoid modes
•   Make the interface consistent
Making the interface forgiving
• Users action must be reversible
  – Physical(pointing to wrong command)
  – Mental(wrongly deciding to select data or
    command)
Make the interface visual
• Interface must provide list of items, instead of
  users to remember all choices
Provide immediate feedback
• Users must receive the feedback immediately
Avoid modes
• Modes force the user to focus on the ways An
  application works, instead of on the task they
  want to complete
• Some of the modes
  – Modal dialog
     • Sometimes an application needs information to continue,
       such as name of a file into which users want to save
       something
  – Spring loaded modes
     • Users must take same action to remain in that mode
     • Ex: dragging mouse
  – Tool driven modes

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Design rule 31

  • 1. Design rule 3 •Allowing users to be in control of the software •Application of corollary 1 •User should control the software instead of software controlling the user
  • 2. Ways to put users in control • Making the interface forgiving • Make the interface visual • Provide immediate feedback • Avoid modes • Make the interface consistent
  • 3. Making the interface forgiving • Users action must be reversible – Physical(pointing to wrong command) – Mental(wrongly deciding to select data or command)
  • 4. Make the interface visual • Interface must provide list of items, instead of users to remember all choices
  • 5. Provide immediate feedback • Users must receive the feedback immediately
  • 6. Avoid modes • Modes force the user to focus on the ways An application works, instead of on the task they want to complete • Some of the modes – Modal dialog • Sometimes an application needs information to continue, such as name of a file into which users want to save something – Spring loaded modes • Users must take same action to remain in that mode • Ex: dragging mouse – Tool driven modes