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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 206 · 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: a clear word like Save is poor button design. (a) False (b) True
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 68 px tall
    Cancel button: 24 px tall
    Done button: 52 px tall     (a) Send (b) Done (c) Cancel (d) Help
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Save button: 36 px tall
    Cancel button: 68 px tall     (a) Help (b) Save (c) Cancel
  4. 4.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  5. 5.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) light grey on white (d) yellow on white
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Done button: 56 px tall
    Next button: 52 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Back button: 68 px tall
    Done button: 72 px tall     (a) Back (b) Done (c) Start
  8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Back button: 40 px tall
    Next button: 68 px tall     (a) Next (b) Save (c) Back
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Start button: 32 px tall
    Cancel button: 72 px tall     (a) Help (b) Start (c) Cancel
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Start button: 52 px tall
    Done button: 36 px tall
    Next button: 36 px tall
  13. 13.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.True or false: a big, easy tap area is poor button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Back button: 40 px tall
    Next button: 52 px tall
    Done button: 44 px tall
  16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 56 px tall
    Help button: 28 px tall
    Start button: 64 px tall     (a) Done (b) Next (c) Start (d) Help
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Save button: 68 px tall
    Next button: 40 px tall     (a) Done (b) Next (c) Save
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 56 px tall
    Done button: 32 px tall     (a) Help (b) Done (c) Save
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Send button: 52 px tall
    Done button: 44 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Save button: 44 px tall
    Send button: 40 px tall
  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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Next button: 64 px tall
    Start button: 64 px tall
  25. 25.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on black (d) red on green
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Back button: 52 px tall
    Save button: 40 px tall     (a) Back (b) Save (c) Cancel
  27. 27.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Back button: 40 px tall
    Start button: 48 px tall
    Save button: 56 px tall
  29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  31. 31.True or false: strong colour contrast is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 64 px tall
    Save button: 48 px tall
    Cancel button: 24 px tall     (a) Save (b) Start (c) Cancel (d) Back
  33. 33.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Help button: 68 px tall
    Cancel button: 48 px tall     (a) Help (b) Save (c) Cancel
  35. 35.True or false: a clear word like Save is good button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  37. 37.True or false: icons with no meaning is poor button design. (a) True (b) False
  38. 38.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Start button: 52 px tall
    Help button: 44 px tall
  40. 40.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) yellow on white (d) dark blue on white

Answer key

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

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