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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 302 · 40 questions
TalentJR

Developer's tip (Big and bold): Our rule: every button is at least 48 px tall. Missing px = 48 − height. Leave space between buttons; use clear words like Save or Send. Strong contrast (black on yellow, white on dark green) is easy to read; similar colours are hard.

NameDateTime takenScore ___ / 40
  1. 1.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 32 px tall
    Cancel button: 64 px tall
    Done button: 48 px tall
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Start button: 48 px tall
    Next button: 64 px tall
    Help button: 56 px tall     (a) Start (b) Help (c) Next (d) Save
  3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Send button: 48 px tall
    Help button: 36 px tall
  5. 5.True or false: space between buttons is poor button design. (a) False (b) True
  6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.True or false: icons with no meaning is poor button design. (a) False (b) True
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Send button: 44 px tall
    Help button: 52 px tall
  9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  10. 10.True or false: grey text on grey is good button design. (a) False (b) True
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 36 px tall
    Back button: 40 px tall
    Help button: 40 px tall
  12. 12.True or false: strong colour contrast is poor button design. (a) True (b) False
  13. 13.True or false: icons with no meaning is good button design. (a) False (b) True
  14. 14.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 52 px tall
    Cancel button: 52 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Send button: 40 px tall
    Next button: 32 px tall
  17. 17.True or false: space between buttons is good button design. (a) False (b) True
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Help button: 24 px tall
    Back button: 72 px tall     (a) Help (b) Start (c) Back
  19. 19.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  20. 20.True or false: buttons almost touching is good button design. (a) False (b) True
  21. 21.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) yellow on white (d) pale pink on white
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Done button: 60 px tall
    Send button: 60 px tall
    Back button: 32 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Start button: 28 px tall
    Cancel button: 48 px tall
    Next button: 64 px tall     (a) Cancel (b) Save (c) Next (d) Start
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Send button: 44 px tall
    Save button: 60 px tall
    Help button: 60 px tall     (a) Save (b) Start (c) Help (d) Send
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  27. 27.True or false: a clear word like Save is good button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Help button: 64 px tall
    Next button: 52 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 44 px tall
    Back button: 36 px tall
    Start button: 52 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  35. 35.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) dark blue on black (d) black on yellow
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 48 px tall
    Done button: 56 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 44 px tall
    Send button: 48 px tall
    Next button: 64 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 48 px tall
    Save button: 40 px tall
    Next button: 44 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 40 px tall
    Done button: 40 px tall
    Send button: 36 px tall
  40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design

Answer key

  1. 2
  2. Save
  3. hard to read
  4. 1
  5. False
  6. easy to read
  7. True
  8. 1
  9. poor design
  10. False
  11. 0
  12. False
  13. False
  14. True
  15. 3
  16. 0
  17. True
  18. Help
  19. poor design
  20. False
  21. white on dark green
  22. 3
  23. Start
  24. 12
  25. Send
  26. 24
  27. True
  28. 3
  29. 12
  30. hard to read
  31. easy to read
  32. 24
  33. 2
  34. 8
  35. dark blue on black
  36. 2
  37. 3
  38. 2
  39. 0
  40. poor design

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