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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 572 · 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.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 56 px tall
    Back button: 32 px tall
    Next button: 48 px tall     (a) Send (b) Back (c) Cancel (d) Next
  3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 32 px tall
    Done button: 36 px tall
  5. 5.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Help button: 52 px tall
    Start button: 56 px tall
    Back button: 48 px tall
  7. 7.True or false: a tiny 20 px button is good button design. (a) True (b) False
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Help button: 72 px tall
    Done button: 52 px tall     (a) Done (b) Help (c) Save
  9. 9.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) black on pale grey (d) white on dark green
  10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
  11. 11.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  12. 12.True or false: space between buttons is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Back button: 44 px tall
    Help button: 56 px tall
  14. 14.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 52 px tall
    Back button: 36 px tall
    Next button: 52 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Send button: 48 px tall
    Back button: 52 px tall
    Save button: 48 px tall     (a) Save (b) Back (c) Start (d) Send
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 52 px tall
    Next button: 24 px tall     (a) Back (b) Next (c) Send
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Start button: 52 px tall
    Save button: 36 px tall     (a) Save (b) Done (c) Start
  19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 44 px tall
    Next button: 52 px tall     (a) Next (b) Save (c) Help
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 24 px tall
    Start button: 64 px tall
    Send button: 64 px tall     (a) Cancel (b) Next (c) Send (d) Start
  23. 23.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) dark blue on white (d) white on dark green
  25. 25.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 60 px tall
    Cancel button: 40 px tall
    Help button: 60 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Next button: 72 px tall
    Send button: 56 px tall     (a) Send (b) Next (c) Done
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Next button: 36 px tall
    Start button: 48 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Send button: 48 px tall
    Save button: 48 px tall
    Next button: 52 px tall     (a) Cancel (b) Save (c) Send (d) Next
  32. 32.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 64 px tall
    Back button: 44 px tall
    Help button: 52 px tall     (a) Next (b) Help (c) Save (d) Back
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Send button: 48 px tall
    Cancel button: 60 px tall
    Help button: 44 px tall
  36. 36.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.True or false: buttons almost touching is good button design. (a) False (b) True
  38. 38.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 40 px tall
    Back button: 52 px tall     (a) Back (b) Save (c) Next
  40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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