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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 491 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Cancel button: 36 px tall
    Back button: 48 px tall     (a) Next (b) Back (c) Cancel
  2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 40 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Send (c) Next
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) red on green (d) white on black
  7. 7.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  9. 9.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) dark blue on white (d) light grey on white
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 60 px tall
    Cancel button: 36 px tall
    Save button: 36 px tall
  11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  12. 12.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.True or false: grey text on grey is good button design. (a) True (b) False
  14. 14.True or false: space between buttons is poor button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  16. 16.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) dark blue on white (d) pale pink on white
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Done button: 56 px tall
    Cancel button: 32 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 56 px tall
    Start button: 44 px tall
    Next button: 44 px tall
  20. 20.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.True or false: icons with no meaning is poor button design. (a) True (b) False
  22. 22.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on pale grey (d) yellow on white
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Send button: 56 px tall
    Save button: 64 px tall
    Cancel button: 56 px tall     (a) Save (b) Back (c) Cancel (d) Send
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Back button: 64 px tall
    Done button: 40 px tall
    Send button: 56 px tall     (a) Start (b) Done (c) Back (d) Send
  25. 25.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  26. 26.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.True or false: a clear word like Save is poor button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Help button: 52 px tall
    Save button: 60 px tall
    Back button: 60 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 68 px tall
    Back button: 64 px tall
    Done button: 40 px tall     (a) Back (b) Help (c) Save (d) Done
  30. 30.True or false: buttons almost touching is poor button design. (a) False (b) True
  31. 31.🔘 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
    Back button: 40 px tall
    Help button: 44 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Done button: 56 px tall
    Cancel button: 68 px tall     (a) Cancel (b) Done (c) Help
  34. 34.True or false: space between buttons is good button design. (a) False (b) True
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 40 px tall
    Send button: 44 px tall
    Next button: 60 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Done button: 52 px tall
    Cancel button: 60 px tall
    Save button: 32 px tall
  37. 37.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  38. 38.True or false: a big, easy tap area is poor button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  40. 40.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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