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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 187 · 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 Send button is 24 px tall. How many px taller must it be?
  2. 2.True or false: a clear word like Save is good button design. (a) False (b) True
  3. 3.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) dark blue on white (d) light grey on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 60 px tall
    Start button: 48 px tall
  6. 6.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on yellow
  7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Back button: 44 px tall
    Start button: 56 px tall     (a) Next (b) Start (c) Back
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 44 px tall
    Next button: 44 px tall
  10. 10.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) pale pink on white (d) dark blue on black
  11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Help button: 60 px tall
    Cancel button: 40 px tall
  13. 13.True or false: grey text on grey is poor button design. (a) False (b) True
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Back button: 48 px tall
    Save button: 60 px tall     (a) Save (b) Back (c) Next
  15. 15.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) dark blue on black (d) yellow on white
  16. 16.True or false: strong colour contrast is good button design. (a) False (b) True
  17. 17.True or false: a tiny 20 px button is good button design. (a) True (b) False
  18. 18.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  21. 21.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Save button: 68 px tall
    Help button: 72 px tall     (a) Save (b) Help (c) Back
  24. 24.True or false: a clear word like Save is poor button design. (a) False (b) True
  25. 25.True or false: strong colour contrast is poor button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Send button: 60 px tall
    Save button: 60 px tall     (a) Start (b) Send (c) Save
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 64 px tall
    Start button: 52 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 32 px tall
    Help button: 52 px tall
    Done button: 60 px tall
  29. 29.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 36 px tall
    Next button: 60 px tall
    Cancel button: 36 px tall
  31. 31.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  33. 33.True or false: icons with no meaning is poor button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Send button: 40 px tall
    Back button: 56 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Back button: 60 px tall
    Start button: 56 px tall
    Help button: 48 px tall     (a) Help (b) Back (c) Done (d) Start
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  38. 38.True or false: a big, easy tap area is good button design. (a) True (b) False
  39. 39.True or false: space between buttons is poor button design. (a) False (b) True
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?

Answer key

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

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