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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 400 · 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.True or false: space between buttons is good button design. (a) True (b) False
  2. 2.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) yellow on white (d) white on black
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  5. 5.True or false: a big, easy tap area is poor button design. (a) True (b) False
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Next button: 64 px tall
    Send button: 36 px tall
    Start button: 32 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 64 px tall
    Next button: 36 px tall
  8. 8.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) pale pink on white (d) white on dark green
  9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 32 px tall
    Send button: 56 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Help button: 48 px tall
    Next button: 44 px tall
  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?
    Save button: 32 px tall
    Done button: 52 px tall
    Help button: 32 px tall
    Back button: 44 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 64 px tall
    Start button: 64 px tall
    Save button: 44 px tall
  15. 15.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) red on green (d) yellow on white
  16. 16.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Help button: 56 px tall
    Cancel button: 48 px tall     (a) Cancel (b) Send (c) Help
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Send button: 36 px tall
    Next button: 60 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Done button: 52 px tall
    Cancel button: 40 px tall
    Start button: 56 px tall
  21. 21.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  23. 23.True or false: buttons almost touching is poor button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Back button: 36 px tall
    Send button: 64 px tall     (a) Send (b) Back (c) Done
  25. 25.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) yellow on white (d) light grey on white
  26. 26.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) black on yellow
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  28. 28.True or false: a big, easy tap area is good button design. (a) False (b) True
  29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.True or false: a tiny 20 px button is good button design. (a) False (b) True
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Back button: 36 px tall
    Done button: 48 px tall     (a) Done (b) Start (c) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Send button: 72 px tall
    Next button: 36 px tall     (a) Next (b) Cancel (c) Send
  33. 33.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Save button: 72 px tall
    Help button: 36 px tall
    Start button: 48 px tall     (a) Help (b) Start (c) Save (d) Send
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Save button: 72 px tall
    Cancel button: 52 px tall
    Help button: 52 px tall     (a) Cancel (b) Help (c) Start (d) Save
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 44 px tall
    Done button: 32 px tall
  38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Next button: 36 px tall
    Save button: 60 px tall
  40. 40.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) dark blue on black (d) yellow on white

Answer key

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

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