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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 336 · 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.True or false: a clear word like Save is poor button design. (a) True (b) False
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 32 px tall
    Next button: 36 px tall
  3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Next button: 40 px tall
    Back button: 52 px tall
    Done button: 60 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 48 px tall
    Save button: 60 px tall
    Cancel button: 28 px tall     (a) Save (b) Done (c) Cancel (d) Help
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Send button: 60 px tall
    Save button: 44 px tall
    Start button: 60 px tall     (a) Send (b) Save (c) Start (d) Help
  9. 9.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) dark blue on white (d) black on yellow
  10. 10.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) dark blue on black
  11. 11.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) pale pink on white (d) white on dark green
  12. 12.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.True or false: grey text on grey is good button design. (a) False (b) True
  14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) yellow on white (d) red on green
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  20. 20.True or false: buttons almost touching is poor button design. (a) False (b) True
  21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Save button: 56 px tall
    Send button: 52 px tall     (a) Save (b) Send (c) Done
  23. 23.True or false: space between buttons is good button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 64 px tall
    Help button: 32 px tall
    Done button: 60 px tall
  26. 26.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  27. 27.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  28. 28.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) black on yellow
  29. 29.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on pale grey
  30. 30.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  32. 32.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 64 px tall
    Done button: 60 px tall
  35. 35.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) light grey on white
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Back button: 64 px tall
    Start button: 72 px tall
    Send button: 72 px tall     (a) Send (b) Done (c) Back (d) Start
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 36 px tall
    Send button: 40 px tall
    Back button: 32 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Help button: 60 px tall
    Back button: 56 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?

Answer key

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

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