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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 402 · 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: strong colour contrast is poor button design. (a) False (b) True
  2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 36 px tall
    Save button: 68 px tall     (a) Save (b) Back (c) Next
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Done button: 52 px tall
    Start button: 52 px tall
  8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) black on pale grey (d) dark blue on black
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Send button: 52 px tall
    Done button: 52 px tall     (a) Done (b) Send (c) Cancel
  12. 12.🌗 Is pale pink on white 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. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 36 px tall
    Done button: 64 px tall
  14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 64 px tall
    Next button: 44 px tall
  18. 18.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  19. 19.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on dark green (d) light grey on white
  20. 20.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  22. 22.True or false: buttons almost touching is poor button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 56 px tall
    Send button: 60 px tall
    Start button: 36 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Save button: 48 px tall
    Next button: 56 px tall
  25. 25.True or false: a big, easy tap area is good button design. (a) False (b) True
  26. 26.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) yellow on white (d) dark blue on black
  27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Back button: 60 px tall
    Cancel button: 24 px tall     (a) Back (b) Next (c) Cancel
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Save button: 56 px tall
    Start button: 56 px tall
    Help button: 68 px tall     (a) Save (b) Help (c) Next (d) Start
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 60 px tall
    Start button: 40 px tall
    Next button: 48 px tall     (a) Next (b) Start (c) Save (d) Back
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 52 px tall
    Done button: 56 px tall
    Back button: 24 px tall     (a) Done (b) Start (c) Cancel (d) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 32 px tall
    Done button: 56 px tall
  33. 33.True or false: a big, easy tap area is poor button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 32 px tall
    Help button: 64 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Done button: 56 px tall
    Send button: 56 px tall     (a) Start (b) Send (c) Done
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 40 px tall
    Back button: 40 px tall
    Start button: 32 px tall
  37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  39. 39.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) pale pink on white
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Help button: 24 px tall
    Start button: 72 px tall
    Save button: 56 px tall     (a) Start (b) Save (c) Next (d) Help

Answer key

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

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