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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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