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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 338 · 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.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  3. 3.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) dark blue on black (d) white on dark green
  4. 4.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) dark blue on white (d) white on black
  5. 5.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  8. 8.True or false: strong colour contrast is good button design. (a) True (b) False
  9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  10. 10.True or false: buttons almost touching is good button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Back button: 44 px tall
    Cancel button: 56 px tall
    Send button: 36 px tall
  12. 12.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 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?
    Cancel button: 52 px tall
    Save button: 32 px tall
    Back button: 48 px tall     (a) Back (b) Save (c) Cancel
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Cancel button: 60 px tall
    Back button: 44 px tall
  17. 17.True or false: a big, easy tap area is poor button design. (a) False (b) True
  18. 18.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) pale pink on white (d) red on green
  22. 22.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) yellow on white
  23. 23.True or false: a clear word like Save is good button design. (a) False (b) True
  24. 24.True or false: a clear word like Save is poor button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Done button: 32 px tall
    Start button: 44 px tall
  26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 28 px tall
    Help button: 52 px tall     (a) Help (b) Save (c) Cancel
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  29. 29.True or false: icons with no meaning is good button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  32. 32.True or false: space between buttons is good button design. (a) False (b) True
  33. 33.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Back button: 52 px tall
    Cancel button: 48 px tall
  35. 35.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 28 px tall
    Done button: 72 px tall
    Cancel button: 48 px tall     (a) Done (b) Save (c) Cancel (d) Next
  37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  39. 39.🌗 Is white on black 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. Which button is too small?
    Next button: 44 px tall
    Back button: 64 px tall
    Help button: 48 px tall
    Done button: 56 px tall     (a) Help (b) Back (c) Done (d) Next

Answer key

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

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