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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 362 · 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: a tiny 20 px button? (a) good design (b) poor design
  2. 2.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) black on pale grey (d) black on yellow
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Save button: 52 px tall
    Cancel button: 52 px tall     (a) Save (b) Cancel (c) Start
  4. 4.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) dark blue on white (d) white on dark green
  5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 64 px tall
    Next button: 56 px tall
    Start button: 24 px tall     (a) Next (b) Save (c) Start (d) Cancel
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  8. 8.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.True or false: a tiny 20 px button is good button design. (a) True (b) False
  10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Back button: 24 px tall
    Cancel button: 52 px tall     (a) Back (b) Next (c) Cancel
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Done button: 56 px tall
    Help button: 24 px tall
    Send button: 72 px tall     (a) Back (b) Send (c) Done (d) Help
  13. 13.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 56 px tall
    Next button: 36 px tall     (a) Next (b) Send (c) Save
  15. 15.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) dark blue on white (d) white on dark green
  16. 16.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) black on pale grey
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Save button: 56 px tall
    Send button: 28 px tall     (a) Help (b) Save (c) Send
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Help button: 48 px tall
    Back button: 64 px tall
    Cancel button: 32 px tall
  21. 21.True or false: space between buttons is poor button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  23. 23.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  24. 24.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Next button: 40 px tall
    Start button: 40 px tall
    Cancel button: 48 px tall
  26. 26.True or false: space between buttons is good button design. (a) False (b) True
  27. 27.True or false: strong colour contrast is good button design. (a) True (b) False
  28. 28.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) pale pink on white (d) white on black
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Save button: 44 px tall
    Cancel button: 56 px tall
    Help button: 64 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 52 px tall
    Cancel button: 36 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Back button: 64 px tall
    Next button: 40 px tall
    Save button: 56 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Next button: 40 px tall
    Save button: 60 px tall
    Done button: 52 px tall
  35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  37. 37.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 48 px tall
    Cancel button: 44 px tall     (a) Back (b) Send (c) Cancel
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Start button: 60 px tall
    Cancel button: 60 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 60 px tall
    Send button: 56 px tall
    Done button: 32 px tall     (a) Done (b) Send (c) Help (d) Cancel

Answer key

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

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