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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 577 · 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: 60 px tall
    Done button: 56 px tall
    Next button: 52 px tall
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Cancel button: 28 px tall
    Start button: 68 px tall
    Save button: 48 px tall     (a) Next (b) Save (c) Start (d) Cancel
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 48 px tall
    Save button: 48 px tall
  4. 4.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) light grey on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  6. 6.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 48 px tall
    Back button: 28 px tall     (a) Cancel (b) Start (c) Back
  8. 8.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Help button: 52 px tall
    Done button: 36 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 56 px tall
    Help button: 52 px tall
    Start button: 40 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Send button: 44 px tall
    Help button: 40 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  15. 15.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) white on black (d) dark blue on black
  16. 16.True or false: grey text on grey is good button design. (a) False (b) True
  17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  19. 19.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Cancel button: 68 px tall
    Back button: 52 px tall
    Help button: 52 px tall     (a) Back (b) Start (c) Help (d) Cancel
  21. 21.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Send button: 52 px tall
    Cancel button: 48 px tall
    Back button: 72 px tall     (a) Start (b) Back (c) Cancel (d) Send
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Done button: 32 px tall
    Save button: 56 px tall
  26. 26.True or false: a clear word like Save is poor button design. (a) True (b) False
  27. 27.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 56 px tall
    Done button: 36 px tall
  29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  30. 30.True or false: icons with no meaning is good button design. (a) False (b) True
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  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?
    Cancel button: 52 px tall
    Done button: 56 px tall
    Back button: 48 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 52 px tall
    Cancel button: 40 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Send button: 68 px tall
    Cancel button: 72 px tall     (a) Help (b) Cancel (c) Send
  36. 36.True or false: buttons almost touching is poor button design. (a) True (b) False
  37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 56 px tall
    Help button: 40 px tall
    Start button: 48 px tall     (a) Start (b) Help (c) Next (d) Done
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Start button: 44 px tall
    Done button: 44 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Save button: 56 px tall
    Help button: 60 px tall     (a) Send (b) Save (c) Help

Answer key

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

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