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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 151 · 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: grey text on grey is good button design. (a) True (b) False
  2. 2.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 60 px tall
    Send button: 48 px tall     (a) Next (b) Send (c) Save
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 72 px tall
    Send button: 52 px tall
    Start button: 52 px tall     (a) Cancel (b) Save (c) Send (d) Start
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 52 px tall
    Back button: 24 px tall     (a) Back (b) Send (c) Help
  6. 6.True or false: strong colour contrast is poor button design. (a) False (b) True
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Next button: 52 px tall
    Save button: 52 px tall
    Cancel button: 44 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Help button: 36 px tall
    Back button: 72 px tall
    Start button: 48 px tall     (a) Help (b) Done (c) Back (d) Start
  9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Start button: 36 px tall
    Back button: 40 px tall
    Done button: 48 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Start button: 72 px tall
    Save button: 64 px tall     (a) Save (b) Next (c) Start
  12. 12.True or false: a clear word like Save is poor button design. (a) True (b) False
  13. 13.True or false: buttons almost touching is good button design. (a) False (b) True
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  15. 15.🌗 Is red on green 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: strong colour contrast? (a) poor design (b) good design
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Done button: 48 px tall
    Save button: 52 px tall
    Start button: 48 px tall     (a) Save (b) Help (c) Start (d) Done
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 32 px tall
    Cancel button: 52 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Cancel button: 60 px tall
    Help button: 64 px tall     (a) Next (b) Help (c) Cancel
  21. 21.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) dark blue on white (d) black on yellow
  22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Cancel button: 68 px tall
    Start button: 72 px tall     (a) Start (b) Send (c) Cancel
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Send button: 36 px tall
    Cancel button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Save button: 32 px tall
    Start button: 60 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 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?
    Back button: 40 px tall
    Start button: 52 px tall
    Send button: 48 px tall
  28. 28.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 44 px tall
    Cancel button: 44 px tall
    Back button: 52 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 60 px tall
    Cancel button: 60 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 40 px tall
    Start button: 40 px tall
  32. 32.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) white on black (d) yellow on white
  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.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on pale grey (d) black on yellow
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 48 px tall
    Start button: 36 px tall
  36. 36.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Back button: 52 px tall
    Save button: 44 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 40 px tall
    Start button: 36 px tall
    Cancel button: 52 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Save button: 52 px tall
    Send button: 56 px tall
    Back button: 32 px tall
  40. 40.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) pale pink on white (d) red on green

Answer key

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

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