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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 224 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Save button: 52 px tall
    Send button: 68 px tall
    Help button: 24 px tall     (a) Send (b) Save (c) Start (d) Help
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 32 px tall
    Start button: 60 px tall
    Done button: 64 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 52 px tall
    Save button: 32 px tall
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 60 px tall
    Next button: 32 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 48 px tall
    Save button: 36 px tall
  6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) pale pink on white (d) white on dark green
  8. 8.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  9. 9.True or false: icons with no meaning is poor button design. (a) True (b) False
  10. 10.True or false: grey text on grey is poor button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 32 px tall
    Back button: 40 px tall
    Help button: 36 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 36 px tall
    Save button: 40 px tall
  13. 13.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) yellow on white (d) red on green
  15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  16. 16.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 36 px tall
    Save button: 64 px tall     (a) Help (b) Send (c) Save
  19. 19.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  20. 20.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) white on dark green (d) white on black
  22. 22.🌗 Is black on yellow 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. The Back button is 28 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Done button: 52 px tall
    Send button: 32 px tall
  25. 25.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  28. 28.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Start button: 44 px tall
    Done button: 56 px tall
    Cancel button: 60 px tall     (a) Done (b) Save (c) Cancel (d) Start
  30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 64 px tall
    Done button: 40 px tall
    Cancel button: 60 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  33. 33.True or false: buttons almost touching is good button design. (a) True (b) False
  34. 34.True or false: space between buttons is good button design. (a) False (b) True
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 40 px tall
    Send button: 40 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Done button: 36 px tall
    Cancel button: 44 px tall
  37. 37.True or false: a big, easy tap area is good button design. (a) False (b) True
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 64 px tall
    Start button: 44 px tall
    Next button: 40 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  40. 40.True or false: space between buttons is poor button design. (a) False (b) True

Answer key

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

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