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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 394 · 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 big, easy tap area? (a) good design (b) poor design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Next button: 44 px tall
    Back button: 52 px tall     (a) Next (b) Back (c) Save
  4. 4.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Next button: 52 px tall
    Save button: 40 px tall
    Back button: 64 px tall
  6. 6.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on yellow (d) white on black
  7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  8. 8.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) white on dark green (d) black on pale grey
  9. 9.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.True or false: strong colour contrast is good button design. (a) False (b) True
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  15. 15.True or false: space between buttons is good button design. (a) False (b) True
  16. 16.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.True or false: buttons almost touching is poor button design. (a) True (b) False
  18. 18.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on black (d) white on dark green
  19. 19.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Cancel button: 60 px tall
    Done button: 60 px tall
    Start button: 36 px tall
  23. 23.True or false: a tiny 20 px button is good button design. (a) True (b) False
  24. 24.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) light grey on white (d) yellow on white
  25. 25.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Start button: 36 px tall
    Cancel button: 60 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Help button: 40 px tall
    Start button: 36 px tall
    Done button: 36 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 32 px tall
    Next button: 56 px tall     (a) Save (b) Cancel (c) Next
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Send button: 64 px tall
    Save button: 60 px tall
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Save button: 48 px tall
    Next button: 64 px tall
    Back button: 64 px tall     (a) Save (b) Next (c) Back (d) Done
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Next button: 40 px tall
    Send button: 52 px tall
    Start button: 56 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 52 px tall
    Send button: 28 px tall
    Next button: 68 px tall     (a) Next (b) Send (c) Help (d) Cancel
  34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Back button: 52 px tall
    Next button: 60 px tall     (a) Next (b) Back (c) Help
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 36 px tall
    Save button: 52 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 32 px tall
    Done button: 40 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 56 px tall
    Next button: 64 px tall
    Done button: 56 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 32 px tall
    Send button: 56 px tall
  40. 40.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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