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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 418 · 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.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) yellow on white (d) black on yellow
  2. 2.True or false: space between buttons is poor button design. (a) False (b) True
  3. 3.True or false: strong colour contrast is good button design. (a) False (b) True
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Send button: 56 px tall
    Help button: 28 px tall     (a) Cancel (b) Send (c) Help
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 60 px tall
    Start button: 52 px tall
    Done button: 32 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Next button: 24 px tall
    Help button: 64 px tall
    Send button: 56 px tall     (a) Help (b) Start (c) Send (d) Next
  7. 7.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.True or false: a clear word like Save is poor button design. (a) False (b) True
  11. 11.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Save button: 52 px tall
    Help button: 40 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 36 px tall
    Send button: 64 px tall     (a) Help (b) Save (c) Send
  15. 15.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  17. 17.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) pale pink on white (d) black on yellow
  18. 18.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on white (d) red on green
  19. 19.True or false: icons with no meaning is poor button design. (a) False (b) True
  20. 20.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on black (d) light grey on white
  21. 21.True or false: space between buttons 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?
    Done button: 44 px tall
    Next button: 40 px tall
    Back button: 32 px tall
    Help button: 32 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Save button: 28 px tall
    Next button: 52 px tall     (a) Save (b) Cancel (c) Next
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Save button: 56 px tall
    Help button: 44 px tall     (a) Save (b) Back (c) Help
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 68 px tall
    Next button: 56 px tall
    Save button: 36 px tall     (a) Save (b) Next (c) Cancel (d) Help
  26. 26.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 60 px tall
    Save button: 60 px tall
    Next button: 40 px tall     (a) Next (b) Send (c) Cancel (d) Save
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Start button: 52 px tall
    Next button: 60 px tall     (a) Start (b) Cancel (c) Next
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 44 px tall
    Help button: 40 px tall
    Done button: 32 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  32. 32.True or false: icons with no meaning is good button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 64 px tall
    Send button: 44 px tall     (a) Send (b) Help (c) Save
  34. 34.True or false: grey text on grey 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?
    Next button: 36 px tall
    Done button: 48 px tall
    Send button: 48 px tall
    Save button: 52 px tall
  36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 32 px tall
    Send button: 52 px tall
    Save button: 56 px tall     (a) Save (b) Start (c) Send
  38. 38.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on black (d) white on black
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Send button: 60 px tall
    Next button: 68 px tall     (a) Next (b) Help (c) Send

Answer key

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

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