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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 591 · 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.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) dark blue on white
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Save button: 64 px tall
    Cancel button: 48 px tall
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Help button: 48 px tall
    Next button: 48 px tall     (a) Help (b) Next (c) Save
  5. 5.True or false: icons with no meaning is good button design. (a) True (b) False
  6. 6.True or false: space between buttons is good button design. (a) True (b) False
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 52 px tall
    Back button: 56 px tall
    Next button: 64 px tall     (a) Back (b) Next (c) Cancel (d) Save
  8. 8.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on dark green (d) pale pink on white
  9. 9.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on dark green (d) yellow on white
  10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 40 px tall
    Next button: 64 px tall     (a) Cancel (b) Next (c) Start
  14. 14.True or false: a clear word like Save is good button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Cancel button: 32 px tall
    Start button: 36 px tall
  16. 16.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Next button: 68 px tall
    Help button: 68 px tall
    Save button: 68 px tall     (a) Next (b) Save (c) Back (d) Help
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Cancel button: 56 px tall
    Save button: 72 px tall
    Help button: 44 px tall     (a) Cancel (b) Next (c) Help (d) Save
  19. 19.True or false: buttons almost touching is good button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Save button: 60 px tall
    Cancel button: 60 px tall
    Next button: 56 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Start button: 60 px tall
    Save button: 44 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 60 px tall
    Done button: 52 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  24. 24.True or false: a tiny 20 px button is good button design. (a) False (b) True
  25. 25.True or false: buttons almost touching is poor button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  27. 27.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  28. 28.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Cancel button: 60 px tall
    Back button: 72 px tall     (a) Back (b) Save (c) Cancel
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Send button: 68 px tall
    Back button: 36 px tall     (a) Send (b) Start (c) Back
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Cancel button: 64 px tall
    Next button: 32 px tall     (a) Cancel (b) Next (c) Back
  32. 32.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  33. 33.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  34. 34.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on black (d) white on dark green
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Save button: 44 px tall
    Back button: 48 px tall     (a) Next (b) Back (c) Save
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 52 px tall
    Next button: 32 px tall
    Help button: 64 px tall
  37. 37.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) white on black
  38. 38.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Help button: 48 px tall
    Done button: 52 px tall
    Next button: 32 px tall     (a) Done (b) Next (c) Back (d) Help
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Send button: 36 px tall
    Done button: 52 px tall
    Save button: 56 px tall

Answer key

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

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