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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 75 · 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. Which button is too small?
    Send button: 68 px tall
    Done button: 48 px tall
    Back button: 40 px tall     (a) Done (b) Back (c) Send
  2. 2.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  4. 4.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 32 px tall
    Cancel button: 44 px tall
    Save button: 36 px tall
  7. 7.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) pale pink on white (d) white on black
  8. 8.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) black on pale grey (d) dark blue on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  12. 12.🌗 Is dark blue on white 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. Which button is too small?
    Help button: 64 px tall
    Send button: 60 px tall
    Done button: 36 px tall
    Cancel button: 60 px tall     (a) Done (b) Help (c) Send (d) Cancel
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Start button: 32 px tall
    Save button: 60 px tall
  15. 15.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on white (d) red on green
  16. 16.True or false: strong colour contrast is poor button design. (a) True (b) False
  17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 72 px tall
    Help button: 68 px tall     (a) Help (b) Done (c) Send
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  21. 21.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  22. 22.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  23. 23.True or false: space between buttons is good button design. (a) True (b) False
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 24 px tall
    Help button: 48 px tall
    Cancel button: 48 px tall     (a) Next (b) Cancel (c) Help (d) Save
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 28 px tall
    Done button: 48 px tall     (a) Done (b) Save (c) Next
  26. 26.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Save button: 52 px tall
    Next button: 40 px tall     (a) Send (b) Save (c) Next
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Help button: 40 px tall
    Cancel button: 52 px tall
    Next button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Cancel button: 52 px tall
    Done button: 36 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  32. 32.🔘 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) Next (b) Cancel (c) Help
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 44 px tall
    Help button: 48 px tall
  34. 34.True or false: icons with no meaning is good button design. (a) False (b) True
  35. 35.True or false: grey text on grey is good button design. (a) False (b) True
  36. 36.True or false: buttons almost touching is poor button design. (a) True (b) False
  37. 37.True or false: a clear word like Save is good button design. (a) True (b) False
  38. 38.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) dark blue on white (d) yellow on white
  39. 39.True or false: a big, easy tap area is poor button design. (a) False (b) True
  40. 40.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) yellow on white (d) dark blue on black

Answer key

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

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