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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 313 · 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.True or false: strong colour contrast is poor button design. (a) True (b) False
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Next button: 72 px tall
    Back button: 56 px tall
    Send button: 68 px tall     (a) Done (b) Send (c) Back (d) Next
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 24 px tall
    Help button: 52 px tall
    Cancel button: 52 px tall     (a) Back (b) Help (c) Cancel (d) Send
  4. 4.True or false: a big, easy tap area is poor button design. (a) False (b) True
  5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  6. 6.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) red on green (d) black on yellow
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Next button: 64 px tall
    Start button: 24 px tall     (a) Send (b) Next (c) Start
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Done button: 56 px tall
    Send button: 48 px tall     (a) Done (b) Back (c) Send
  10. 10.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) black on pale grey
  11. 11.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  12. 12.Which colour pair is easy to read? (a) white on dark green (b) dark blue on black (c) yellow on white (d) red on green
  13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 44 px tall
    Save button: 52 px tall
  15. 15.True or false: strong colour contrast is good button design. (a) True (b) False
  16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Start button: 28 px tall
    Next button: 56 px tall
    Back button: 72 px tall     (a) Back (b) Start (c) Done (d) Next
  18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  22. 22.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (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?
    Next button: 28 px tall
    Help button: 52 px tall
    Save button: 64 px tall
    Cancel button: 64 px tall     (a) Next (b) Save (c) Cancel (d) Help
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  25. 25.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.True or false: icons with no meaning is poor button design. (a) False (b) True
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  28. 28.True or false: grey text on grey is good button design. (a) True (b) False
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Done button: 28 px tall
    Cancel button: 72 px tall
    Next button: 56 px tall     (a) Cancel (b) Save (c) Next (d) Done
  30. 30.True or false: a big, easy tap area is good 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?
    Back button: 40 px tall
    Help button: 48 px tall
    Save button: 60 px tall
    Start button: 32 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Send button: 60 px tall
    Help button: 44 px tall
    Save button: 68 px tall     (a) Next (b) Help (c) Send (d) Save
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Done button: 64 px tall
    Start button: 60 px tall
    Next button: 48 px tall
  34. 34.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) light grey on white (d) dark blue on white
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Send button: 60 px tall
    Next button: 40 px tall
    Save button: 56 px tall     (a) Save (b) Send (c) Help (d) Next
  36. 36.True or false: a clear word like Save is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Help button: 60 px tall
    Next button: 48 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Help button: 60 px tall
    Cancel button: 40 px tall
    Send button: 64 px tall     (a) Send (b) Cancel (c) Help (d) Start
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Start button: 52 px tall
    Save button: 44 px tall
    Send button: 44 px tall
  40. 40.True or false: a tiny 20 px button is poor button design. (a) True (b) False

Answer key

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

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