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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 251 · 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: strong colour contrast? (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?
    Save button: 56 px tall
    Help button: 52 px tall
    Cancel button: 32 px tall
    Back button: 52 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  5. 5.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  6. 6.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on black (d) white on dark green
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 64 px tall
    Save button: 40 px tall
    Done button: 52 px tall     (a) Send (b) Done (c) Next (d) Save
  10. 10.True or false: a clear word like Save is good button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 28 px tall
    Start button: 68 px tall     (a) Start (b) Help (c) Cancel
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 60 px tall
    Start button: 60 px tall
  13. 13.Which colour pair is hard to read? (a) red on green (b) black on yellow (c) dark blue on white (d) white on dark green
  14. 14.True or false: strong colour contrast is poor button design. (a) True (b) False
  15. 15.True or false: buttons almost touching is poor button design. (a) False (b) True
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Back button: 44 px tall
    Send button: 68 px tall     (a) Send (b) Next (c) Back
  17. 17.True or false: a big, easy tap area is good button design. (a) False (b) True
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Save button: 52 px tall
    Back button: 60 px tall
    Help button: 52 px tall
  19. 19.True or false: icons with no meaning is poor button design. (a) True (b) False
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Save button: 48 px tall
    Send button: 64 px tall     (a) Send (b) Save (c) Done
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Done button: 44 px tall
    Send button: 56 px tall
    Save button: 44 px tall
  22. 22.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) red on green (d) dark blue on white
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Back button: 44 px tall
    Save button: 64 px tall     (a) Save (b) Cancel (c) Back
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Send button: 36 px tall
    Start button: 32 px tall
  25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.True or false: strong colour contrast is good button design. (a) False (b) True
  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: 36 px tall
    Help button: 40 px tall
    Back button: 56 px tall
  29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  30. 30.True or false: space between buttons is good button design. (a) False (b) True
  31. 31.True or false: buttons almost touching is good button design. (a) False (b) True
  32. 32.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) pale pink on white (d) dark blue on black
  33. 33.True or false: a clear word like Save is poor button design. (a) False (b) True
  34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  36. 36.True or false: space between buttons is poor button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?

Answer key

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

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