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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 137 · 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?
    Start button: 36 px tall
    Help button: 32 px tall
    Next button: 56 px tall
  2. 2.True or false: space between buttons is good button design. (a) True (b) False
  3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  6. 6.🌗 Is white on dark green 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) dark blue on white (b) black on pale grey (c) white on black (d) pale pink on white
  8. 8.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on yellow
  9. 9.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) white on black (d) black on pale grey
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Done button: 48 px tall
    Back button: 48 px tall
    Next button: 72 px tall     (a) Back (b) Next (c) Save (d) Done
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Cancel button: 48 px tall
    Done button: 32 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 36 px tall
    Back button: 48 px tall     (a) Back (b) Start (c) Send
  13. 13.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  15. 15.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  17. 17.True or false: a tiny 20 px button is good button design. (a) True (b) False
  18. 18.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.True or false: a clear word like Save is poor button design. (a) True (b) False
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  21. 21.True or false: buttons almost touching is good button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Next button: 32 px tall
    Send button: 36 px tall
    Save button: 40 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Done button: 32 px tall
    Next button: 56 px tall
    Send button: 60 px tall     (a) Send (b) Done (c) Next (d) Back
  24. 24.True or false: a big, easy tap area is good button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 72 px tall
    Send button: 44 px tall
    Help button: 56 px tall     (a) Help (b) Save (c) Send (d) Next
  26. 26.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Cancel button: 64 px tall
    Done button: 64 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Help button: 56 px tall
    Save button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 64 px tall
    Help button: 56 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Save button: 52 px tall
    Help button: 56 px tall
    Cancel button: 36 px tall     (a) Help (b) Cancel (c) Save (d) Done
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Cancel button: 52 px tall
    Save button: 52 px tall
    Done button: 52 px tall     (a) Save (b) Done (c) Send (d) Cancel
  32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.True or false: grey text on grey is good button design. (a) False (b) True
  34. 34.True or false: strong colour contrast is good button design. (a) True (b) False
  35. 35.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 40 px tall
    Done button: 32 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 28 px tall
    Next button: 56 px tall     (a) Send (b) Cancel (c) Next
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 36 px tall
    Send button: 32 px tall
    Cancel button: 40 px tall
  40. 40.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) dark blue on white (d) pale pink on white

Answer key

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

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