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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 546 · 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. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 32 px tall
    Cancel button: 56 px tall
    Done button: 36 px tall
  2. 2.True or false: strong colour contrast is poor button design. (a) True (b) False
  3. 3.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) black on pale grey (d) light grey on white
  4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.True or false: a clear word like Save is good button design. (a) False (b) True
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 36 px tall
    Cancel button: 56 px tall
    Next button: 48 px tall     (a) Cancel (b) Next (c) Save (d) Back
  7. 7.True or false: a clear word like Save is poor button design. (a) False (b) True
  8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Start button: 28 px tall
    Done button: 64 px tall     (a) Done (b) Start (c) Back
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Start button: 32 px tall
    Next button: 40 px tall
    Save button: 36 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Done button: 36 px tall
    Help button: 60 px tall
    Back button: 44 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Back button: 72 px tall
    Next button: 32 px tall     (a) Back (b) Next (c) Cancel
  14. 14.True or false: buttons almost touching is poor button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  16. 16.True or false: a big, easy tap area is poor button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 64 px tall
    Back button: 48 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Help button: 28 px tall
    Start button: 64 px tall     (a) Done (b) Start (c) Help
  19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Save button: 36 px tall
    Start button: 32 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 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: 52 px tall
    Send button: 60 px tall
    Back button: 44 px tall
    Help button: 56 px tall     (a) Cancel (b) Back (c) Help (d) Send
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Cancel button: 36 px tall
    Done button: 56 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Back button: 48 px tall
    Done button: 48 px tall
  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.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) pale pink on white
  27. 27.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) pale pink on white (d) yellow on white
  28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Back button: 52 px tall
    Start button: 52 px tall
  32. 32.True or false: icons with no meaning is good button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 52 px tall
    Next button: 32 px tall     (a) Send (b) Cancel (c) Next
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Save button: 64 px tall
    Back button: 24 px tall
    Cancel button: 64 px tall     (a) Start (b) Cancel (c) Save (d) Back
  35. 35.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 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?
    Save button: 60 px tall
    Cancel button: 24 px tall
    Send button: 68 px tall
    Start button: 68 px tall     (a) Cancel (b) Start (c) Save (d) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Start button: 36 px tall
    Cancel button: 56 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 64 px tall
    Help button: 24 px tall     (a) Start (b) Save (c) Help

Answer key

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

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