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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 209 · 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.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  2. 2.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  3. 3.True or false: grey text on grey is poor button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  10. 10.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on black (d) yellow on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 60 px tall
    Send button: 52 px tall
    Back button: 48 px tall     (a) Send (b) Cancel (c) Back (d) Done
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 52 px tall
    Back button: 56 px tall     (a) Back (b) Next (c) Done
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  14. 14.True or false: space between buttons is good button design. (a) True (b) False
  15. 15.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) white on black
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Save button: 28 px tall
    Done button: 52 px tall
    Cancel button: 60 px tall     (a) Next (b) Cancel (c) Save (d) Done
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Start button: 68 px tall
    Done button: 32 px tall     (a) Done (b) Start (c) Back
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 28 px tall
    Cancel button: 60 px tall
    Send button: 72 px tall     (a) Cancel (b) Save (c) Send (d) Next
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Start button: 44 px tall
    Save button: 64 px tall
    Done button: 60 px tall     (a) Help (b) Done (c) Save (d) Start
  21. 21.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Back button: 48 px tall
    Done button: 24 px tall     (a) Save (b) Done (c) Back
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Start button: 64 px tall
    Help button: 60 px tall     (a) Start (b) Help (c) Back
  25. 25.Which colour pair is easy to read? (a) dark blue on white (b) red on green (c) yellow on white (d) dark blue on black
  26. 26.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) light grey on white (d) black on pale grey
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Next button: 72 px tall
    Done button: 56 px tall
    Start button: 64 px tall     (a) Send (b) Done (c) Next (d) Start
  28. 28.True or false: grey text on grey is good button design. (a) True (b) False
  29. 29.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.True or false: buttons almost touching is good button design. (a) False (b) True
  31. 31.True or false: strong colour contrast is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 64 px tall
    Back button: 40 px tall
  35. 35.True or false: a tiny 20 px button is good button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 52 px tall
    Help button: 48 px tall     (a) Next (b) Help (c) Send
  37. 37.True or false: a big, easy tap area is good button design. (a) False (b) True
  38. 38.True or false: icons with no meaning is good button design. (a) True (b) False
  39. 39.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Next button: 48 px tall
    Save button: 40 px tall
    Send button: 60 px tall

Answer key

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

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