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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 358 · 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.

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

Answer key

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

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