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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 271 · 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) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Start button: 60 px tall
    Help button: 36 px tall
    Cancel button: 56 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  4. 4.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) white on black (d) red on green
  5. 5.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) yellow on white (d) black on pale grey
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Cancel button: 40 px tall
    Next button: 44 px tall
  7. 7.True or false: a big, easy tap area is good button design. (a) True (b) False
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Start button: 52 px tall
    Cancel button: 32 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 36 px tall
    Back button: 60 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Start button: 60 px tall
    Cancel button: 68 px tall     (a) Start (b) Cancel (c) Done
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Back button: 32 px tall
    Save button: 36 px tall
    Help button: 32 px tall
  14. 14.True or false: icons with no meaning is good button design. (a) False (b) True
  15. 15.🌗 Is red on green 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. Which button is too small?
    Start button: 56 px tall
    Cancel button: 72 px tall
    Help button: 32 px tall     (a) Help (b) Cancel (c) Start
  17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 56 px tall
    Cancel button: 52 px tall
    Done button: 40 px tall
  19. 19.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) red on green
  20. 20.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) dark blue on black
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Help button: 52 px tall
    Cancel button: 48 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 36 px tall
    Help button: 48 px tall
    Send button: 48 px tall     (a) Save (b) Help (c) Send (d) Cancel
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 24 px tall
    Back button: 56 px tall     (a) Help (b) Cancel (c) Back
  24. 24.True or false: a clear word like Save is poor button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  26. 26.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Start button: 48 px tall
    Next button: 32 px tall     (a) Cancel (b) Start (c) Next
  28. 28.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Cancel button: 36 px tall
    Next button: 32 px tall
    Help button: 32 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Save button: 48 px tall
    Done button: 40 px tall
    Next button: 56 px tall     (a) Next (b) Save (c) Start (d) Done
  32. 32.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  35. 35.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) black on yellow (d) light grey on white
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 48 px tall
    Done button: 28 px tall     (a) Done (b) Save (c) Help
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Save button: 32 px tall
    Help button: 60 px tall     (a) Save (b) Done (c) Help
  40. 40.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on black (d) pale pink on white

Answer key

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

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