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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 386 · 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: icons with no meaning is good button design. (a) True (b) False
  2. 2.True or false: grey text on grey is good button design. (a) False (b) True
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Send button: 52 px tall
    Done button: 68 px tall
    Back button: 56 px tall     (a) Send (b) Done (c) Next (d) Back
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Start button: 24 px tall
    Save button: 64 px tall
    Back button: 56 px tall     (a) Save (b) Start (c) Done (d) Back
  5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) red on green (d) dark blue on black
  7. 7.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  9. 9.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) red on green
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Help button: 64 px tall
    Save button: 24 px tall
    Done button: 48 px tall     (a) Save (b) Back (c) Done (d) Help
  12. 12.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  14. 14.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  16. 16.True or false: strong colour contrast is poor button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 56 px tall
    Save button: 28 px tall     (a) Next (b) Save (c) Back
  20. 20.True or false: a clear word like Save is poor button design. (a) True (b) False
  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?
    Back button: 48 px tall
    Cancel button: 48 px tall
    Save button: 52 px tall
    Next button: 24 px tall     (a) Next (b) Cancel (c) Back (d) Save
  23. 23.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  25. 25.True or false: space between buttons is good button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Next button: 52 px tall
    Back button: 32 px tall
  27. 27.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Back button: 44 px tall
    Start button: 36 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 48 px tall
    Help button: 40 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  32. 32.True or false: buttons almost touching is good button design. (a) True (b) False
  33. 33.True or false: a big, easy tap area is poor button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 36 px tall
    Cancel button: 52 px tall
  35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 36 px tall
    Save button: 60 px tall
    Next button: 64 px tall
  37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 36 px tall
    Cancel button: 64 px tall
  39. 39.True or false: strong colour contrast is good button design. (a) False (b) True
  40. 40.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on black (d) dark blue on white

Answer key

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

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