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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 554 · 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.

NameDateTime takenScore ___ / 40
  1. 1.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Send button: 60 px tall
    Back button: 56 px tall
  3. 3.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) light grey on white (d) white on black
  4. 4.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) red on green
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 68 px tall
    Send button: 40 px tall
    Cancel button: 72 px tall     (a) Send (b) Help (c) Save (d) Cancel
  6. 6.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  8. 8.True or false: buttons almost touching is poor button design. (a) False (b) True
  9. 9.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Back button: 64 px tall
    Help button: 44 px tall     (a) Help (b) Cancel (c) Back
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Start button: 64 px tall
    Send button: 68 px tall     (a) Send (b) Start (c) Help
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Save button: 36 px tall
    Send button: 36 px tall
    Next button: 48 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Cancel button: 68 px tall
    Help button: 48 px tall     (a) Help (b) Save (c) Cancel
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 48 px tall
    Help button: 32 px tall
    Start button: 36 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  18. 18.True or false: strong colour contrast is good button design. (a) False (b) True
  19. 19.True or false: buttons almost touching is good button design. (a) False (b) True
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Help button: 44 px tall
    Cancel button: 48 px tall
    Next button: 36 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Help button: 48 px tall
    Send button: 40 px tall     (a) Send (b) Save (c) Help
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Help button: 68 px tall
    Done button: 48 px tall     (a) Done (b) Send (c) Help
  25. 25.True or false: space between buttons is poor button design. (a) False (b) True
  26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  28. 28.True or false: space between buttons is good button design. (a) True (b) False
  29. 29.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Start button: 48 px tall
    Cancel button: 56 px tall
    Done button: 56 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Back button: 56 px tall
    Send button: 60 px tall
    Cancel button: 32 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 56 px tall
    Done button: 60 px tall
    Save button: 44 px tall
  33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 64 px tall
    Done button: 52 px tall
    Cancel button: 40 px tall     (a) Done (b) Cancel (c) Start (d) Save
  35. 35.True or false: a big, easy tap area is good button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Next button: 64 px tall
    Save button: 28 px tall     (a) Done (b) Next (c) Save
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Send button: 52 px tall
    Start button: 28 px tall
    Help button: 72 px tall     (a) Help (b) Save (c) Send (d) Start
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?

Answer key

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

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