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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 188 · 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. Which button is too small?
    Done button: 28 px tall
    Back button: 72 px tall
    Save button: 68 px tall     (a) Save (b) Back (c) Done
  2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 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?
    Next button: 48 px tall
    Save button: 52 px tall
    Send button: 24 px tall     (a) Save (b) Next (c) Send
  7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (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?
    Save button: 64 px tall
    Cancel button: 60 px tall
    Start button: 52 px tall
    Help button: 40 px tall
  9. 9.True or false: a big, easy tap area is poor button design. (a) False (b) True
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 52 px tall
    Send button: 28 px tall
    Cancel button: 56 px tall     (a) Save (b) Help (c) Send (d) Cancel
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 52 px tall
    Next button: 68 px tall
    Save button: 52 px tall     (a) Save (b) Help (c) Next (d) Cancel
  12. 12.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) dark blue on white (d) white on black
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Send button: 60 px tall
    Cancel button: 68 px tall     (a) Send (b) Save (c) Cancel
  14. 14.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 60 px tall
    Done button: 60 px tall
    Start button: 36 px tall     (a) Save (b) Done (c) Cancel (d) Start
  18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Cancel button: 64 px tall
    Next button: 32 px tall
    Start button: 36 px tall
  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. Which button is too small?
    Send button: 72 px tall
    Cancel button: 24 px tall
    Next button: 56 px tall     (a) Next (b) Send (c) Cancel
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  23. 23.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) white on dark green (d) pale pink on white
  24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  25. 25.True or false: space between buttons is poor button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Save button: 44 px tall
    Next button: 44 px tall
    Cancel button: 60 px tall
  28. 28.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) red on green (d) white on dark green
  29. 29.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) red on green (d) light grey on white
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 56 px tall
    Send button: 56 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 36 px tall
    Start button: 56 px tall
    Back button: 64 px tall     (a) Start (b) Back (c) Done (d) Send
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Send button: 32 px tall
    Save button: 40 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 32 px tall
    Send button: 52 px tall
    Start button: 56 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  36. 36.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) yellow on white (d) white on black
  37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 72 px tall
    Send button: 28 px tall     (a) Send (b) Cancel (c) Start
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Send button: 68 px tall
    Done button: 60 px tall     (a) Start (b) Done (c) Send
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?

Answer key

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

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