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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 443 · 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: strong colour contrast? (a) good design (b) poor design
  2. 2.True or false: a tiny 20 px button is good button design. (a) True (b) False
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Back button: 40 px tall
    Cancel button: 44 px tall
  4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  5. 5.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 60 px tall
    Send button: 28 px tall
    Help button: 48 px tall     (a) Send (b) Start (c) Help (d) Back
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Send button: 36 px tall
    Start button: 60 px tall
    Next button: 52 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  9. 9.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) light grey on white
  10. 10.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) yellow on white (d) black on pale grey
  11. 11.True or false: buttons almost touching is good button design. (a) False (b) True
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Start button: 56 px tall
    Done button: 48 px tall
    Help button: 44 px tall     (a) Start (b) Save (c) Done (d) Help
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Done button: 60 px tall
    Cancel button: 56 px tall     (a) Cancel (b) Done (c) Next
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 44 px tall
    Start button: 56 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Next button: 36 px tall
    Cancel button: 52 px tall
    Start button: 60 px tall
  16. 16.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) black on pale grey (d) red on green
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Help button: 32 px tall
    Save button: 52 px tall
    Start button: 48 px tall     (a) Start (b) Save (c) Back (d) Help
  18. 18.🌗 Is white on black 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. Which button is too small?
    Start button: 28 px tall
    Send button: 64 px tall
    Help button: 48 px tall     (a) Send (b) Start (c) Help
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Next button: 36 px tall
    Start button: 48 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 72 px tall
    Start button: 32 px tall
    Done button: 52 px tall     (a) Next (b) Done (c) Start (d) Save
  22. 22.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  23. 23.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 36 px tall
    Save button: 60 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 72 px tall
    Start button: 24 px tall     (a) Save (b) Help (c) Start
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 60 px tall
    Help button: 48 px tall
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Back button: 48 px tall
    Save button: 64 px tall
    Cancel button: 44 px tall     (a) Save (b) Cancel (c) Back (d) Start
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Start button: 52 px tall
    Send button: 36 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Done button: 48 px tall
    Send button: 32 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Cancel button: 32 px tall
    Send button: 60 px tall
    Start button: 48 px tall
  36. 36.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  37. 37.True or false: space between buttons is good button design. (a) True (b) False
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Help button: 64 px tall
    Done button: 64 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  40. 40.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) black on yellow (d) dark blue on black

Answer key

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

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