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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 1 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  2. 2.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Save button: 72 px tall
    Send button: 60 px tall     (a) Send (b) Start (c) Save
  5. 5.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Back button: 40 px tall
    Save button: 68 px tall     (a) Cancel (b) Save (c) Back
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  8. 8.🌗 Is white on dark green 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: grey text on grey? (a) good design (b) poor design
  10. 10.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) yellow on white (d) dark blue on black
  11. 11.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Done button: 64 px tall
    Back button: 60 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Cancel button: 60 px tall
    Back button: 44 px tall
    Done button: 64 px tall     (a) Save (b) Cancel (c) Done (d) Back
  14. 14.True or false: grey text on grey is poor button design. (a) False (b) True
  15. 15.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 68 px tall
    Back button: 28 px tall
    Save button: 48 px tall     (a) Save (b) Done (c) Next (d) Back
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 28 px tall
    Help button: 48 px tall     (a) Done (b) Help (c) Start
  18. 18.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  19. 19.True or false: a big, easy tap area is poor button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Back button: 32 px tall
    Help button: 52 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Start button: 60 px tall
    Next button: 56 px tall     (a) Back (b) Start (c) Next
  23. 23.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 64 px tall
    Help button: 60 px tall
    Back button: 64 px tall
  25. 25.True or false: strong colour contrast is good button design. (a) False (b) True
  26. 26.True or false: grey text on grey is good button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Cancel button: 40 px tall
    Back button: 40 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 52 px tall
    Send button: 48 px tall
    Back button: 28 px tall     (a) Send (b) Save (c) Next (d) Back
  31. 31.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  32. 32.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.True or false: icons with no meaning is good button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next 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?
    Save button: 68 px tall
    Cancel button: 32 px tall
    Next button: 64 px tall
    Send button: 64 px tall     (a) Cancel (b) Next (c) Send (d) Save
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Next button: 48 px tall
    Save button: 64 px tall     (a) Save (b) Next (c) Cancel
  37. 37.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on yellow (d) white on dark green
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Help button: 40 px tall
    Start button: 60 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Cancel button: 56 px tall
    Next button: 44 px tall
    Back button: 40 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Save button: 60 px tall
    Done button: 44 px tall     (a) Save (b) Done (c) Back

Answer key

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

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