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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 525 · 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. The Done button is 44 px tall. How many px taller must it be?
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  4. 4.True or false: icons with no meaning is poor button design. (a) False (b) True
  5. 5.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) yellow on white (d) red on green
  6. 6.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  7. 7.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Help button: 36 px tall
    Save button: 44 px tall
  12. 12.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on black (d) black on yellow
  13. 13.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on black (d) dark blue on white
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Done button: 56 px tall
    Start button: 56 px tall
    Save button: 44 px tall     (a) Cancel (b) Start (c) Save (d) Done
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Start button: 48 px tall
    Done button: 64 px tall     (a) Done (b) Start (c) Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 32 px tall
    Cancel button: 52 px tall
    Next button: 56 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 56 px tall
    Back button: 60 px tall     (a) Send (b) Next (c) Back
  19. 19.True or false: a big, easy tap area is poor button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 64 px tall
    Save button: 60 px tall
    Done button: 56 px tall
  21. 21.True or false: strong colour contrast is good button design. (a) True (b) False
  22. 22.True or false: buttons almost touching is good button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 68 px tall
    Send button: 72 px tall     (a) Save (b) Done (c) Send
  24. 24.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on white (d) light grey on white
  25. 25.🔘 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
    Back button: 64 px tall
    Cancel button: 36 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  27. 27.True or false: space between buttons is good button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Next button: 48 px tall
    Back button: 40 px tall
    Save button: 52 px tall     (a) Next (b) Save (c) Done (d) Back
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Help button: 44 px tall
    Done button: 64 px tall
    Cancel button: 36 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Save button: 56 px tall
    Cancel button: 24 px tall     (a) Next (b) Cancel (c) Save
  33. 33.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on pale grey (d) pale pink on white
  36. 36.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  39. 39.True or false: buttons almost touching is poor button design. (a) False (b) True
  40. 40.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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