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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 571 · 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: 32 px tall
    Start button: 56 px tall
    Cancel button: 56 px tall
  2. 2.🌗 Is pale pink on white 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: buttons almost touching? (a) poor design (b) good design
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) yellow on white (d) dark blue on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Help button: 40 px tall
    Send button: 52 px tall
    Cancel button: 52 px tall     (a) Help (b) Next (c) Cancel (d) Send
  7. 7.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.True or false: a clear word like Save is good button design. (a) False (b) True
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  10. 10.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) dark blue on black
  11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  15. 15.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Save button: 36 px tall
    Cancel button: 48 px tall
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  18. 18.True or false: a tiny 20 px button is good button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 64 px tall
    Done button: 32 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Send button: 56 px tall
    Cancel button: 52 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Start button: 32 px tall
    Done button: 52 px tall
    Cancel button: 52 px tall
  22. 22.True or false: a big, easy tap area is poor button design. (a) False (b) True
  23. 23.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) black on pale grey
  24. 24.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on yellow (d) light grey on white
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Help button: 32 px tall
    Save button: 40 px tall
    Cancel button: 44 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  27. 27.True or false: buttons almost touching is good button design. (a) False (b) True
  28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.True or false: buttons almost touching is poor button design. (a) True (b) False
  32. 32.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) black on yellow (d) white on dark green
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Help button: 24 px tall
    Cancel button: 52 px tall     (a) Help (b) Cancel (c) Start
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 32 px tall
    Next button: 56 px tall     (a) Done (b) Next (c) Help
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Start button: 60 px tall
    Next button: 56 px tall
    Save button: 28 px tall     (a) Next (b) Done (c) Save (d) Start
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel 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?
    Cancel button: 60 px tall
    Start button: 36 px tall
    Send button: 60 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Back button: 48 px tall
    Cancel button: 56 px tall     (a) Help (b) Cancel (c) Back
  40. 40.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design

Answer key

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

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