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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 112 · 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.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  3. 3.True or false: grey text on grey is good button design. (a) False (b) True
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) pale pink on white (d) yellow on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 36 px tall
    Cancel button: 48 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Send button: 44 px tall
    Next button: 36 px tall
    Save button: 56 px tall
  9. 9.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  11. 11.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.True or false: space between buttons is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Start button: 64 px tall
    Send button: 40 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 36 px tall
    Help button: 48 px tall
  16. 16.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) red on green (d) black on yellow
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Save button: 60 px tall
    Cancel button: 56 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Back button: 28 px tall
    Next button: 48 px tall
    Done button: 52 px tall     (a) Back (b) Next (c) Done (d) Save
  19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  21. 21.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) red on green (d) dark blue on black
  22. 22.True or false: a clear word like Save is poor button design. (a) True (b) False
  23. 23.True or false: a clear word like Save is good button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 44 px tall
    Done button: 36 px tall
    Save button: 44 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Send button: 52 px tall
    Start button: 64 px tall
  26. 26.True or false: strong colour contrast is good button design. (a) False (b) True
  27. 27.True or false: buttons almost touching is poor button design. (a) False (b) True
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.True or false: a big, easy tap area is poor button design. (a) False (b) True
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Cancel button: 36 px tall
    Start button: 64 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Cancel button: 40 px tall
    Save button: 36 px tall
    Next button: 44 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Done button: 44 px tall
    Help button: 52 px tall     (a) Done (b) Help (c) Save
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 32 px tall
    Back button: 44 px tall
    Cancel button: 64 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  35. 35.True or false: grey text on grey is poor button design. (a) False (b) True
  36. 36.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) yellow on white (d) white on dark green
  37. 37.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) dark blue on white (d) black on yellow
  38. 38.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Help button: 32 px tall
    Next button: 56 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 60 px tall
    Send button: 64 px tall
    Back button: 40 px tall

Answer key

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

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