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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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