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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 344 · 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: strong colour contrast is good button design. (a) False (b) True
  2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Done button: 44 px tall
    Back button: 52 px tall
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) white on dark green
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 24 px tall
    Next button: 56 px tall     (a) Cancel (b) Start (c) Next
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 52 px tall
    Send button: 52 px tall
    Done button: 52 px tall
  7. 7.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) pale pink on white (d) black on pale grey
  8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  10. 10.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 44 px tall
    Save button: 64 px tall
  12. 12.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.True or false: grey text on grey is good button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  15. 15.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) black on pale grey (d) white on black
  16. 16.True or false: a clear word like Save is good button design. (a) True (b) False
  17. 17.True or false: a tiny 20 px button is good button design. (a) True (b) False
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Next button: 64 px tall
    Back button: 64 px tall
    Send button: 44 px tall     (a) Next (b) Back (c) Send (d) Cancel
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  22. 22.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  23. 23.True or false: icons with no meaning is poor button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  25. 25.True or false: space between buttons is good button design. (a) False (b) True
  26. 26.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on yellow (d) dark blue on white
  27. 27.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Start button: 52 px tall
    Cancel button: 56 px tall
    Back button: 36 px tall     (a) Cancel (b) Start (c) Back (d) Done
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  30. 30.True or false: space between buttons is poor button design. (a) False (b) True
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 48 px tall
    Help button: 28 px tall     (a) Help (b) Start (c) Cancel
  32. 32.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  33. 33.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  35. 35.True or false: a clear word like Save is poor button design. (a) False (b) True
  36. 36.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Cancel button: 72 px tall
    Back button: 48 px tall     (a) Cancel (b) Start (c) Back
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Send button: 48 px tall
    Help button: 40 px tall
    Cancel button: 48 px tall     (a) Start (b) Help (c) Cancel (d) Send
  39. 39.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) white on dark green (d) light grey on white
  40. 40.True or false: buttons almost touching is good button design. (a) True (b) False

Answer key

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

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