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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 647 · 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. Which button is too small?
    Next button: 48 px tall
    Back button: 36 px tall
    Send button: 64 px tall     (a) Next (b) Back (c) Send
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Back button: 52 px tall
    Send button: 32 px tall     (a) Send (b) Save (c) Back
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 60 px tall
    Next button: 48 px tall
    Save button: 40 px tall
  5. 5.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) dark blue on white (d) white on dark green
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  7. 7.Which colour pair is hard to read? (a) pale pink on white (b) white on dark green (c) black on yellow (d) white on black
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 24 px tall
    Start button: 48 px tall     (a) Send (b) Save (c) Start
  9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.True or false: a clear word like Save is good button design. (a) True (b) False
  11. 11.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) pale pink on white
  12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Cancel button: 48 px tall
    Help button: 64 px tall     (a) Save (b) Help (c) Cancel
  14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  16. 16.True or false: icons with no meaning is good button design. (a) False (b) True
  17. 17.True or false: a clear word like Save is poor button design. (a) False (b) True
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Done button: 64 px tall
    Back button: 64 px tall
    Start button: 32 px tall     (a) Start (b) Back (c) Done (d) Cancel
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  21. 21.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Done button: 48 px tall
    Send button: 56 px tall     (a) Done (b) Send (c) Next
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 40 px tall
    Back button: 64 px tall     (a) Back (b) Save (c) Send
  24. 24.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Back button: 28 px tall
    Save button: 64 px tall     (a) Save (b) Back (c) Cancel
  26. 26.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  29. 29.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  30. 30.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.True or false: a big, easy tap area is good button design. (a) False (b) True
  32. 32.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) dark blue on white (d) pale pink on white
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Next button: 32 px tall
    Send button: 40 px tall
    Back button: 32 px tall
  34. 34.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Next button: 32 px tall
    Cancel button: 60 px tall
    Start button: 40 px tall
  36. 36.True or false: grey text on grey is poor button design. (a) True (b) False
  37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  38. 38.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on dark green (d) dark blue on black
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Next button: 60 px tall
    Save button: 56 px tall     (a) Next (b) Save (c) Start
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Start button: 48 px tall
    Done button: 28 px tall
    Cancel button: 68 px tall     (a) Send (b) Cancel (c) Start (d) Done

Answer key

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

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