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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 414 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  3. 3.True or false: strong colour contrast is good button design. (a) True (b) False
  4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Help button: 48 px tall
    Start button: 36 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 56 px tall
    Cancel button: 28 px tall     (a) Cancel (b) Back (c) Done
  7. 7.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) black on pale grey
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  10. 10.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) white on dark green (d) pale pink on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Cancel button: 60 px tall
    Next button: 56 px tall     (a) Next (b) Send (c) Cancel
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  14. 14.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 24 px tall
    Cancel button: 60 px tall
    Back button: 52 px tall     (a) Save (b) Cancel (c) Help (d) Back
  16. 16.True or false: icons with no meaning is poor button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 52 px tall
    Back button: 72 px tall
    Cancel button: 24 px tall     (a) Cancel (b) Back (c) Save (d) Start
  18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
  19. 19.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) pale pink on white (d) yellow on white
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Next button: 64 px tall
    Help button: 36 px tall     (a) Help (b) Save (c) Next
  21. 21.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) dark blue on white (d) black on yellow
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Send button: 36 px tall
    Next button: 40 px tall
    Back button: 64 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 48 px tall
    Done button: 60 px tall
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 24 px tall
    Done button: 52 px tall
    Next button: 64 px tall     (a) Cancel (b) Next (c) Done (d) Help
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 24 px tall
    Cancel button: 60 px tall     (a) Save (b) Start (c) Cancel
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 40 px tall
    Next button: 64 px tall
    Back button: 56 px tall     (a) Cancel (b) Back (c) Send (d) Next
  29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  31. 31.True or false: a clear word like Save is poor button design. (a) True (b) False
  32. 32.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 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?
    Help button: 72 px tall
    Save button: 28 px tall
    Cancel button: 52 px tall
    Send button: 56 px tall     (a) Send (b) Help (c) Save (d) Cancel
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Help button: 60 px tall
    Save button: 28 px tall
    Cancel button: 60 px tall     (a) Help (b) Cancel (c) Save (d) Back
  36. 36.True or false: a clear word like Save is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Start button: 52 px tall
    Help button: 68 px tall
    Back button: 24 px tall     (a) Save (b) Help (c) Back (d) Start
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 44 px tall
    Help button: 60 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Start button: 60 px tall
    Send button: 56 px tall     (a) Next (b) Start (c) Send
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?

Answer key

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

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