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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 676 · 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. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 48 px tall
    Done button: 44 px tall
  2. 2.True or false: a big, easy tap area is poor button design. (a) False (b) True
  3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  4. 4.True or false: strong colour contrast is poor button design. (a) True (b) False
  5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 36 px tall
    Done button: 64 px tall
  7. 7.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  9. 9.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) light grey on white (d) red on green
  10. 10.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) white on black (d) dark blue on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Back button: 64 px tall
    Next button: 44 px tall
    Save button: 60 px tall
  12. 12.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  14. 14.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on black (d) dark blue on black
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 56 px tall
    Done button: 36 px tall     (a) Cancel (b) Save (c) Done
  18. 18.True or false: a tiny 20 px button is good button design. (a) False (b) True
  19. 19.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) black on pale grey (d) dark blue on white
  21. 21.True or false: a clear word like Save is poor button design. (a) True (b) False
  22. 22.True or false: icons with no meaning is good button design. (a) False (b) True
  23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  24. 24.True or false: space between buttons is good button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 36 px tall
    Send button: 48 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  28. 28.True or false: a clear word like Save is good button design. (a) True (b) False
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 40 px tall
    Send button: 52 px tall
    Start button: 52 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 44 px tall
    Next button: 32 px tall
    Send button: 52 px tall
  31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 40 px tall
    Done button: 36 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Save button: 64 px tall
    Send button: 64 px tall     (a) Save (b) Next (c) Send
  34. 34.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 40 px tall
    Save button: 40 px tall
  36. 36.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  38. 38.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) black on pale grey (d) yellow on white
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Cancel button: 72 px tall
    Help button: 56 px tall
    Next button: 44 px tall     (a) Cancel (b) Help (c) Send (d) Next
  40. 40.True or false: a big, easy tap area is good button design. (a) True (b) False

Answer key

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

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