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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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