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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 370 · 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.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) light grey on white (d) red on green
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Start button: 64 px tall
    Next button: 36 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  4. 4.True or false: strong colour contrast is good button design. (a) True (b) False
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 56 px tall
    Save button: 40 px tall
    Send button: 72 px tall     (a) Send (b) Cancel (c) Help (d) Save
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Next button: 52 px tall
    Cancel button: 32 px tall
  7. 7.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Send button: 32 px tall
    Save button: 32 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Back button: 48 px tall
    Done button: 36 px tall
    Cancel button: 48 px tall     (a) Help (b) Done (c) Back (d) Cancel
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Next button: 36 px tall
    Cancel button: 40 px tall
    Back button: 44 px tall
  11. 11.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Done button: 48 px tall
    Send button: 40 px tall
    Save button: 32 px tall
  13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  14. 14.True or false: a tiny 20 px button is good button design. (a) True (b) False
  15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.True or false: a clear word like Save is good button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Send button: 52 px tall
    Back button: 48 px tall     (a) Send (b) Back (c) Save
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Done button: 64 px tall
    Cancel button: 52 px tall     (a) Done (b) Cancel (c) Back
  19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Next button: 64 px tall
    Send button: 52 px tall
    Back button: 40 px tall     (a) Back (b) Send (c) Next (d) Help
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Start button: 60 px tall
    Save button: 64 px tall
    Done button: 56 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  25. 25.True or false: a big, easy tap area is poor button design. (a) True (b) False
  26. 26.True or false: icons with no meaning is poor button design. (a) True (b) False
  27. 27.🌗 Is red on green 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. Which button is too small?
    Send button: 36 px tall
    Save button: 60 px tall
    Done button: 52 px tall     (a) Send (b) Save (c) Done
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Send button: 32 px tall
    Cancel button: 52 px tall
    Done button: 40 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Done button: 32 px tall
    Cancel button: 32 px tall
    Save button: 52 px tall
  32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  34. 34.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) red on green (d) dark blue on black
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  36. 36.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) white on black (d) dark blue on white
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 32 px tall
    Help button: 56 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Start button: 56 px tall
    Back button: 32 px tall
  40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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