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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 662 · 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.

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

Answer key

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

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