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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 321 · 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?
    Cancel button: 60 px tall
    Back button: 36 px tall
    Send button: 52 px tall
    Next button: 48 px tall
  2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) dark blue on white (d) black on pale grey
  6. 6.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) dark blue on black
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Cancel button: 28 px tall
    Back button: 60 px tall     (a) Back (b) Cancel (c) Next
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  10. 10.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Back button: 36 px tall
    Start button: 32 px tall
    Save button: 64 px tall
  12. 12.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  13. 13.True or false: grey text on grey is good button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 32 px tall
    Start button: 32 px tall
    Done button: 60 px tall
  15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Done button: 64 px tall
    Save button: 52 px tall     (a) Next (b) Done (c) Save
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  20. 20.True or false: icons with no meaning is poor button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 32 px tall
    Send button: 44 px tall
    Start button: 40 px tall
  22. 22.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) pale pink on white
  23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 32 px tall
    Send button: 40 px tall
    Help button: 48 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Help button: 52 px tall
    Cancel button: 64 px tall     (a) Help (b) Cancel (c) Next
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Done button: 56 px tall
    Back button: 44 px tall
    Cancel button: 64 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Back button: 52 px tall
    Done button: 60 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 48 px tall
    Help button: 44 px tall
    Back button: 60 px tall
  31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.True or false: a clear word like Save is poor button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Save button: 48 px tall
    Done button: 40 px tall
  34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on black (d) black on pale grey
  38. 38.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) black on pale grey (d) yellow on white
  39. 39.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  40. 40.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) yellow on white (d) black on yellow

Answer key

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

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