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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 83 · 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?
    Done button: 40 px tall
    Send button: 44 px tall
    Help button: 32 px tall
  2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) light grey on white (d) black on pale grey
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 56 px tall
    Done button: 36 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 32 px tall
    Start button: 44 px tall
  6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  8. 8.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on black (d) white on dark green
  9. 9.True or false: icons with no meaning is poor button design. (a) True (b) False
  10. 10.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) dark blue on white
  11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  13. 13.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.True or false: buttons almost touching is good button design. (a) False (b) True
  15. 15.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.True or false: grey text on grey is good button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 60 px tall
    Next button: 44 px tall
    Done button: 60 px tall     (a) Send (b) Done (c) Cancel (d) Next
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  22. 22.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  23. 23.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) dark blue on black (d) light grey on white
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  26. 26.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) pale pink on white (d) yellow on white
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Back button: 56 px tall
    Send button: 52 px tall
    Done button: 28 px tall     (a) Send (b) Done (c) Next (d) Back
  29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  31. 31.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) white on black (d) pale pink on white
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Help button: 48 px tall
    Save button: 56 px tall
    Next button: 44 px tall     (a) Save (b) Next (c) Send (d) Help
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  35. 35.True or false: a clear word like Save is poor button design. (a) True (b) False
  36. 36.True or false: a tiny 20 px button is good button design. (a) False (b) True
  37. 37.True or false: buttons almost touching is poor button design. (a) True (b) False
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  39. 39.True or false: space between buttons is good button design. (a) True (b) False
  40. 40.True or false: a tiny 20 px button is poor button design. (a) True (b) False

Answer key

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

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