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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 226 · 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.

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

Answer key

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

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