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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 331 · 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: a clear word like Save? (a) poor design (b) good design
  2. 2.True or false: strong colour contrast is poor button design. (a) True (b) False
  3. 3.True or false: a clear word like Save is poor button design. (a) False (b) True
  4. 4.True or false: icons with no meaning is good button design. (a) False (b) True
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  6. 6.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) dark blue on white (d) white on black
  7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  9. 9.🌗 Is black on yellow 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. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 32 px tall
    Start button: 52 px tall
  11. 11.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 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?
    Send button: 40 px tall
    Save button: 56 px tall
    Start button: 64 px tall     (a) Start (b) Save (c) Send
  14. 14.True or false: a tiny 20 px button is good button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 48 px tall
    Done button: 36 px tall
    Back button: 52 px tall     (a) Save (b) Cancel (c) Done (d) Back
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Save button: 40 px tall
    Cancel button: 64 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Help button: 56 px tall
    Start button: 28 px tall
    Cancel button: 72 px tall     (a) Start (b) Cancel (c) Help (d) Back
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 72 px tall
    Send button: 56 px tall     (a) Send (b) Save (c) Cancel
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Cancel button: 52 px tall
    Save button: 48 px tall
    Next button: 56 px tall     (a) Back (b) Save (c) Next (d) Cancel
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Send button: 72 px tall
    Cancel button: 56 px tall
    Done button: 48 px tall     (a) Send (b) Done (c) Cancel (d) Save
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 32 px tall
    Done button: 64 px tall
    Help button: 44 px tall
  23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  24. 24.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) red on green (d) yellow on white
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  27. 27.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on black (d) pale pink on white
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Done button: 64 px tall
    Help button: 52 px tall     (a) Help (b) Done (c) Save
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  30. 30.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Start button: 60 px tall
    Next button: 40 px tall
    Done button: 64 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 44 px tall
    Start button: 64 px tall
    Send button: 64 px tall     (a) Start (b) Help (c) Save (d) Send
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  34. 34.True or false: a clear word like Save is good button design. (a) False (b) True
  35. 35.True or false: strong colour contrast is good button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Done button: 40 px tall
    Cancel button: 52 px tall
  37. 37.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) light grey on white
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Done button: 48 px tall
    Save button: 40 px tall
    Next button: 36 px tall
  39. 39.True or false: a big, easy tap area is good button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?

Answer key

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

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