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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 27 · 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?
    Help button: 44 px tall
    Cancel button: 36 px tall
    Next button: 64 px tall
  2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Next button: 40 px tall
    Help button: 60 px tall     (a) Done (b) Help (c) Next
  4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Done button: 48 px tall
    Send button: 32 px tall
    Cancel button: 60 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 32 px tall
    Start button: 32 px tall
  7. 7.True or false: a tiny 20 px button 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?
    Next button: 32 px tall
    Cancel button: 64 px tall
    Start button: 64 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Back button: 56 px tall
    Start button: 24 px tall
    Send button: 56 px tall     (a) Cancel (b) Back (c) Send (d) Start
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Start button: 32 px tall
    Back button: 64 px tall
    Next button: 36 px tall
  11. 11.True or false: a clear word like Save is good button design. (a) False (b) True
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Start button: 52 px tall
    Send button: 52 px tall
  13. 13.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) white on dark green (d) dark blue on white
  14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
  15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Save button: 32 px tall
    Next button: 48 px tall     (a) Next (b) Save (c) Start
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Send button: 44 px tall
    Help button: 52 px tall     (a) Start (b) Help (c) Send
  18. 18.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on white (d) yellow on white
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 48 px tall
    Help button: 36 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Send button: 36 px tall
    Cancel button: 44 px tall
    Help button: 56 px tall
  23. 23.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Back button: 52 px tall
    Next button: 40 px tall
  28. 28.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on black (d) pale pink on white
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Send button: 60 px tall
    Help button: 44 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Done button: 56 px tall
    Cancel button: 44 px tall
    Send button: 60 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Start button: 68 px tall
    Back button: 52 px tall     (a) Back (b) Cancel (c) Start
  32. 32.True or false: strong colour contrast is good button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Start button: 68 px tall
    Save button: 24 px tall
    Done button: 72 px tall     (a) Save (b) Back (c) Done (d) Start
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 48 px tall
    Back button: 52 px tall
    Help button: 48 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 60 px tall
    Help button: 32 px tall
    Save button: 64 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Next button: 64 px tall
    Save button: 68 px tall
    Help button: 32 px tall     (a) Save (b) Start (c) Next (d) Help
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 56 px tall
    Next button: 68 px tall
    Cancel button: 40 px tall     (a) Save (b) Help (c) Next (d) Cancel
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Back button: 52 px tall
    Send button: 64 px tall
    Help button: 68 px tall     (a) Send (b) Help (c) Back (d) Cancel
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Done button: 60 px tall
    Next button: 36 px tall
    Cancel button: 48 px tall

Answer key

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

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