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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 454 · 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 light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  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. How many of these buttons follow the rule?
    Back button: 64 px tall
    Help button: 36 px tall
    Next button: 60 px tall
    Start button: 60 px tall
  4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  7. 7.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on dark green (d) light grey on white
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Help button: 56 px tall
    Send button: 64 px tall
  9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Back button: 64 px tall
    Start button: 32 px tall
    Cancel button: 48 px tall     (a) Cancel (b) Save (c) Back (d) Start
  11. 11.True or false: space between buttons is poor button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Send button: 52 px tall
    Next button: 44 px tall
    Done button: 52 px tall     (a) Done (b) Back (c) Next (d) Send
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Done button: 56 px tall
    Next button: 40 px tall     (a) Done (b) Start (c) Next
  15. 15.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 44 px tall
    Back button: 56 px tall
    Send button: 52 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  18. 18.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  21. 21.True or false: a clear word like Save is good button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Next button: 40 px tall
    Cancel button: 52 px tall
    Send button: 60 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Help button: 60 px tall
    Cancel button: 52 px tall     (a) Back (b) Help (c) Cancel
  24. 24.True or false: a big, easy tap area is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Cancel button: 64 px tall
    Next button: 56 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 40 px tall
    Help button: 32 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  28. 28.True or false: a clear word like Save is poor button design. (a) False (b) True
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 64 px tall
    Back button: 44 px tall
    Next button: 36 px tall
  30. 30.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 48 px tall
    Next button: 64 px tall
    Help button: 36 px tall     (a) Next (b) Save (c) Help (d) Done
  32. 32.True or false: grey text on grey is good button design. (a) False (b) True
  33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Send button: 40 px tall
    Help button: 64 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  36. 36.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 68 px tall
    Start button: 40 px tall
    Cancel button: 52 px tall     (a) Back (b) Start (c) Save (d) Cancel
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Save button: 64 px tall
    Start button: 64 px tall
    Next button: 52 px tall     (a) Cancel (b) Next (c) Start (d) Save
  39. 39.True or false: icons with no meaning is poor button design. (a) False (b) True
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?

Answer key

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

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