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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 645 · 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.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  2. 2.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) light grey on white
  4. 4.True or false: grey text on grey is good button design. (a) True (b) False
  5. 5.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  7. 7.True or false: icons with no meaning is good button design. (a) True (b) False
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 40 px tall
    Done button: 44 px tall
    Cancel button: 48 px tall
  9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 56 px tall
    Next button: 40 px tall
    Cancel button: 52 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Help button: 60 px tall
    Back button: 40 px tall     (a) Cancel (b) Help (c) Back
  13. 13.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) pale pink on white (d) yellow on white
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  15. 15.True or false: buttons almost touching is good button design. (a) True (b) False
  16. 16.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  17. 17.True or false: strong colour contrast is good button design. (a) False (b) True
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Done button: 60 px tall
    Help button: 64 px tall
    Cancel button: 64 px tall     (a) Done (b) Back (c) Help (d) Cancel
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Send button: 52 px tall
    Start button: 72 px tall     (a) Cancel (b) Start (c) Send
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Done button: 64 px tall
    Send button: 32 px tall
    Save button: 40 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 44 px tall
    Done button: 44 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 32 px tall
    Save button: 32 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 32 px tall
    Back button: 64 px tall
    Save button: 72 px tall     (a) Save (b) Cancel (c) Next (d) Back
  28. 28.True or false: buttons almost touching is poor button design. (a) True (b) False
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Help button: 72 px tall
    Next button: 48 px tall     (a) Help (b) Next (c) Start
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Cancel button: 72 px tall
    Send button: 28 px tall     (a) Cancel (b) Send (c) Start
  31. 31.True or false: a tiny 20 px button is good button design. (a) True (b) False
  32. 32.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  33. 33.🌗 Is light grey on white 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?
    Cancel button: 32 px tall
    Help button: 60 px tall
    Send button: 32 px tall
    Done button: 56 px tall
  35. 35.True or false: space between buttons is good button design. (a) False (b) True
  36. 36.True or false: a big, easy tap area is good button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Help button: 72 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Back (c) Help
  38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 36 px tall
    Back button: 36 px tall

Answer key

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

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