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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 625 · 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.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.True or false: grey text on grey is good button design. (a) True (b) False
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 40 px tall
    Cancel button: 52 px tall
  4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Save button: 48 px tall
    Help button: 44 px tall     (a) Save (b) Help (c) Send
  7. 7.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Save button: 52 px tall
    Done button: 64 px tall
    Next button: 44 px tall
  9. 9.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) black on pale grey (d) light grey on white
  10. 10.True or false: space between buttons is good button design. (a) False (b) True
  11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  12. 12.True or false: buttons almost touching is good button design. (a) False (b) True
  13. 13.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) yellow on white (d) pale pink on white
  14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  15. 15.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  20. 20.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) white on black (d) black on pale grey
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  22. 22.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  23. 23.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.True or false: icons with no meaning is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 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: 52 px tall
    Next button: 64 px tall
    Cancel button: 60 px tall
    Send button: 48 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 24 px tall
    Save button: 52 px tall
    Start button: 48 px tall     (a) Next (b) Save (c) Start (d) Send
  29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Save button: 52 px tall
    Next button: 44 px tall     (a) Next (b) Save (c) Send
  31. 31.True or false: a big, easy tap area is poor button design. (a) True (b) False
  32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  33. 33.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Cancel button: 44 px tall
    Help button: 44 px tall
  35. 35.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  37. 37.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) light grey on white (d) dark blue on black
  38. 38.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) white on black
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Send button: 36 px tall
    Next button: 32 px tall

Answer key

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

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