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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 191 · 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.

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

Answer key

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

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