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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 87 · 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.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Send button: 44 px tall
    Start button: 40 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 40 px tall
    Done button: 40 px tall
  4. 4.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) black on yellow
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 48 px tall
    Cancel button: 44 px tall
  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: a big, easy tap area is poor button design. (a) True (b) False
  8. 8.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) pale pink on white (d) red on green
  9. 9.True or false: a clear word like Save is good button design. (a) False (b) True
  10. 10.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) white on dark green (d) pale pink on white
  11. 11.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  12. 12.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) yellow on white (d) red on green
  13. 13.True or false: buttons almost touching is poor button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  15. 15.True or false: grey text on grey is poor button design. (a) True (b) False
  16. 16.True or false: grey text on grey is good button design. (a) True (b) False
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Back button: 36 px tall
    Done button: 56 px tall
  21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Save button: 56 px tall
    Done button: 28 px tall     (a) Cancel (b) Done (c) Save
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Save button: 52 px tall
    Cancel button: 24 px tall     (a) Cancel (b) Next (c) Save
  26. 26.True or false: icons with no meaning is good button design. (a) True (b) False
  27. 27.Which colour pair is hard to read? (a) white on black (b) light grey on white (c) black on pale grey (d) black on yellow
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 56 px tall
    Help button: 48 px tall
    Start button: 48 px tall     (a) Send (b) Help (c) Start (d) Done
  29. 29.True or false: space between buttons is good button design. (a) True (b) False
  30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.True or false: a tiny 20 px button is good button design. (a) True (b) False
  32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.True or false: space between buttons is poor button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Back button: 52 px tall
    Help button: 68 px tall
    Next button: 68 px tall     (a) Help (b) Back (c) Done (d) Next
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Save button: 56 px tall
    Done button: 40 px tall
  36. 36.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) red on green (d) white on black
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Back button: 40 px tall
    Save button: 56 px tall     (a) Save (b) Start (c) Back
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 56 px tall
    Start button: 64 px tall
    Help button: 36 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 40 px tall
    Help button: 52 px tall

Answer key

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

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