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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 617 · 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. The Help button is 40 px tall. How many px taller must it be?
  2. 2.True or false: space between buttons is poor button design. (a) True (b) False
  3. 3.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  4. 4.True or false: strong colour contrast is good button design. (a) True (b) False
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Done button: 36 px tall
    Send button: 64 px tall
    Save button: 36 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  7. 7.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) black on pale grey (d) white on black
  8. 8.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) black on yellow (d) black on pale grey
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Send button: 52 px tall
    Back button: 28 px tall     (a) Help (b) Back (c) Send
  10. 10.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  11. 11.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  12. 12.True or false: grey text on grey is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Help button: 72 px tall
    Start button: 48 px tall
    Save button: 72 px tall     (a) Help (b) Save (c) Back (d) Start
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Back button: 52 px tall
    Next button: 60 px tall
    Send button: 36 px tall     (a) Back (b) Save (c) Next (d) Send
  16. 16.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on black (d) white on dark green
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 40 px tall
    Help button: 64 px tall
    Next button: 68 px tall     (a) Help (b) Cancel (c) Send (d) Next
  18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 40 px tall
    Send button: 68 px tall     (a) Send (b) Save (c) Help
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Done button: 56 px tall
    Back button: 56 px tall     (a) Back (b) Done (c) Save
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Back button: 28 px tall
    Help button: 72 px tall     (a) Help (b) Back (c) Next
  22. 22.True or false: space between buttons is good button design. (a) False (b) True
  23. 23.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Start button: 60 px tall
    Next button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Start button: 40 px tall
    Cancel button: 32 px tall
    Help button: 48 px tall
  26. 26.🌗 Is white on dark 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. Which button is too small?
    Done button: 52 px tall
    Save button: 64 px tall
    Help button: 28 px tall     (a) Save (b) Help (c) Done
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Back button: 32 px tall
    Save button: 36 px tall
    Next button: 36 px tall
  29. 29.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) yellow on white
  30. 30.True or false: buttons almost touching is good button design. (a) True (b) False
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Cancel button: 52 px tall
    Back button: 64 px tall
    Save button: 40 px tall     (a) Cancel (b) Save (c) Help (d) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 72 px tall
    Save button: 28 px tall
    Cancel button: 60 px tall     (a) Send (b) Back (c) Cancel (d) Save
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Start button: 44 px tall
    Save button: 56 px tall
  34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Start button: 44 px tall
    Next button: 48 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. The Save button is 20 px tall. How many px taller must it be?
  38. 38.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.Which colour pair is easy to read? (a) black on pale grey (b) pale pink on white (c) red on green (d) yellow on white
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Back button: 36 px tall
    Cancel button: 36 px tall

Answer key

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

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