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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 328 · 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 poor button design. (a) True (b) False
  2. 2.🌗 Is red on 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: grey text on grey? (a) good design (b) poor design
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) pale pink on white (d) white on dark green
  5. 5.True or false: strong colour contrast is good button design. (a) False (b) True
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on black (d) light grey on white
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 68 px tall
    Start button: 32 px tall     (a) Next (b) Send (c) Start
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Back button: 36 px tall
    Send button: 68 px tall     (a) Next (b) Send (c) Back
  10. 10.True or false: space between buttons is good button design. (a) False (b) True
  11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  12. 12.True or false: buttons almost touching is good button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Save button: 36 px tall
    Cancel button: 60 px tall
    Send button: 32 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Start button: 64 px tall
    Cancel button: 32 px tall
    Done button: 40 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Done button: 56 px tall
    Back button: 72 px tall     (a) Done (b) Back (c) Start
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Next button: 32 px tall
    Back button: 32 px tall
    Cancel button: 60 px tall
  17. 17.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  18. 18.True or false: a big, easy tap area is poor button design. (a) True (b) False
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Send button: 52 px tall
    Start button: 64 px tall
  20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Next button: 36 px tall
    Done button: 32 px tall
  24. 24.True or false: space between buttons is poor button design. (a) True (b) False
  25. 25.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) red on green (d) black on yellow
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  27. 27.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Cancel button: 36 px tall
    Send button: 64 px tall
    Back button: 52 px tall
  31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 36 px tall
    Help button: 48 px tall     (a) Next (b) Done (c) Help
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Done button: 32 px tall
    Next button: 36 px tall
    Cancel button: 56 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Start button: 52 px tall
    Send button: 28 px tall     (a) Send (b) Next (c) Start
  36. 36.True or false: grey text on grey is poor button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 36 px tall
    Save button: 44 px tall
    Next button: 60 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Done button: 64 px tall
    Cancel button: 24 px tall     (a) Cancel (b) Done (c) Back
  39. 39.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Save button: 36 px tall
    Done button: 56 px tall     (a) Save (b) Back (c) Done

Answer key

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

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