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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 129 · 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.

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

Answer key

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

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