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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 222 · 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: a big, easy tap area? (a) poor design (b) good design
  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: strong colour contrast? (a) good design (b) poor design
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Next button: 28 px tall
    Start button: 60 px tall
    Cancel button: 68 px tall     (a) Start (b) Cancel (c) Help (d) Next
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 56 px tall
    Back button: 28 px tall     (a) Save (b) Cancel (c) Back
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 52 px tall
    Save button: 52 px tall
    Help button: 44 px tall
  9. 9.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Back button: 68 px tall
    Send button: 40 px tall
    Next button: 52 px tall     (a) Send (b) Next (c) Back (d) Done
  11. 11.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) light grey on white (d) pale pink on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Save button: 72 px tall
    Cancel button: 48 px tall
    Send button: 64 px tall     (a) Cancel (b) Save (c) Next (d) Send
  13. 13.True or false: a big, easy tap area is good button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Help button: 68 px tall
    Start button: 52 px tall     (a) Next (b) Start (c) Help
  15. 15.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.True or false: a big, easy tap area is poor button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Save button: 60 px tall
    Help button: 56 px tall
    Back button: 48 px tall
  18. 18.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 68 px tall
    Send button: 28 px tall     (a) Done (b) Send (c) Back
  22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  23. 23.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on pale grey (d) black on yellow
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 24 px tall
    Send button: 52 px tall     (a) Send (b) Done (c) Next
  25. 25.True or false: a clear word like Save is good button design. (a) False (b) True
  26. 26.🌗 Is dark blue on white 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. Which button is too small?
    Save button: 48 px tall
    Help button: 56 px tall
    Next button: 36 px tall     (a) Next (b) Save (c) Help
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 32 px tall
    Cancel button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Start button: 24 px tall
    Save button: 68 px tall     (a) Back (b) Save (c) Start
  30. 30.True or false: space between buttons is good button design. (a) True (b) False
  31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  33. 33.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) red on green (d) yellow on white
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Send button: 44 px tall
    Cancel button: 56 px tall
    Next button: 60 px tall     (a) Send (b) Cancel (c) Done (d) Next
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 60 px tall
    Save button: 44 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Next button: 60 px tall
    Back button: 56 px tall     (a) Back (b) Send (c) Next
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Next button: 60 px tall
    Send button: 52 px tall
    Save button: 44 px tall     (a) Send (b) Save (c) Next (d) Start
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Next button: 60 px tall
    Help button: 28 px tall
    Cancel button: 60 px tall     (a) Next (b) Back (c) Cancel (d) Help
  40. 40.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) yellow on white

Answer key

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

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