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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 147 · 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.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Next button: 64 px tall
    Cancel button: 52 px tall
    Start button: 72 px tall     (a) Save (b) Cancel (c) Next (d) Start
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 44 px tall
    Save button: 32 px tall
  7. 7.True or false: space between buttons is poor button design. (a) True (b) False
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Save button: 52 px tall
    Cancel button: 44 px tall     (a) Save (b) Next (c) Cancel
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  10. 10.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) pale pink on white (d) red on green
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Help button: 52 px tall
    Cancel button: 56 px tall     (a) Cancel (b) Help (c) Save
  12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Next button: 64 px tall
    Cancel button: 64 px tall
    Start button: 28 px tall     (a) Next (b) Cancel (c) Back (d) Start
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 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?
    Done button: 64 px tall
    Help button: 40 px tall
    Next button: 48 px tall
    Back button: 52 px tall
  16. 16.True or false: a clear word like Save is poor button design. (a) False (b) True
  17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  22. 22.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Start button: 48 px tall
    Next button: 40 px tall
    Save button: 48 px tall     (a) Help (b) Start (c) Save (d) Next
  24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 40 px tall
    Back button: 36 px tall
    Done button: 44 px tall
  26. 26.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) yellow on white
  27. 27.🔘 Is this good or poor button design: strong colour contrast? (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?
    Send button: 56 px tall
    Done button: 48 px tall
    Save button: 32 px tall
  29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Start button: 36 px tall
    Next button: 48 px tall
    Cancel button: 72 px tall     (a) Start (b) Next (c) Save (d) Cancel
  31. 31.True or false: buttons almost touching is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Help button: 40 px tall
    Start button: 48 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Back button: 52 px tall
    Next button: 64 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 60 px tall
    Save button: 60 px tall
    Start button: 28 px tall     (a) Next (b) Help (c) Save (d) Start
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Help button: 44 px tall
    Back button: 36 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 32 px tall
    Save button: 36 px tall
    Next button: 32 px tall
  37. 37.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Save button: 56 px tall
    Cancel button: 48 px tall
    Help button: 44 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Next button: 52 px tall
    Start button: 32 px tall
    Help button: 60 px tall
  40. 40.True or false: grey text on grey is poor button design. (a) False (b) True

Answer key

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

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