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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 261 · 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 dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Done button: 52 px tall
    Help button: 60 px tall
    Save button: 48 px tall     (a) Done (b) Help (c) Save (d) Next
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Start button: 24 px tall
    Done button: 64 px tall     (a) Start (b) Cancel (c) Done
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Done button: 36 px tall
    Save button: 32 px tall
    Send button: 56 px tall
  6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  8. 8.Which colour pair is hard to read? (a) yellow on white (b) white on black (c) white on dark green (d) black on yellow
  9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  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: strong colour contrast is good button design. (a) False (b) True
  13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Help button: 56 px tall
    Back button: 52 px tall     (a) Back (b) Help (c) Save
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  16. 16.True or false: a big, easy tap area is poor button design. (a) True (b) False
  17. 17.True or false: a big, easy tap area is good button design. (a) False (b) True
  18. 18.True or false: a clear word like Save 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?
    Done button: 48 px tall
    Start button: 52 px tall
    Next button: 36 px tall
    Help button: 36 px tall
  20. 20.True or false: strong colour contrast is poor button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  22. 22.True or false: space between buttons is poor button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  24. 24.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  25. 25.True or false: a tiny 20 px button is good button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 44 px tall
    Back button: 40 px tall
    Send button: 40 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Next button: 48 px tall
    Done button: 72 px tall
    Send button: 36 px tall     (a) Help (b) Done (c) Next (d) Send
  28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  29. 29.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Cancel button: 40 px tall
    Start button: 40 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 48 px tall
    Start button: 60 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  33. 33.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Start button: 32 px tall
    Done button: 36 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  37. 37.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  38. 38.True or false: buttons almost touching is good button design. (a) False (b) True
  39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  40. 40.True or false: grey text on grey is poor button design. (a) False (b) True

Answer key

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

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