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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 179 · 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.True or false: a clear word like Save is poor button design. (a) True (b) False
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Save button: 48 px tall
    Next button: 40 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Next button: 68 px tall
    Back button: 32 px tall     (a) Next (b) Back (c) Save
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Save button: 52 px tall
    Start button: 36 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Help button: 44 px tall
    Next button: 48 px tall     (a) Save (b) Help (c) Next
  8. 8.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Next button: 44 px tall
    Start button: 60 px tall
    Cancel button: 56 px tall     (a) Cancel (b) Send (c) Start (d) Next
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 56 px tall
    Save button: 48 px tall
    Help button: 52 px tall
  11. 11.True or false: icons with no meaning is good button design. (a) True (b) False
  12. 12.Which colour pair is easy to read? (a) dark blue on white (b) red on green (c) light grey on white (d) dark blue on black
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 56 px tall
    Back button: 72 px tall
    Cancel button: 44 px tall     (a) Back (b) Help (c) Cancel (d) Save
  14. 14.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on pale grey (d) white on dark green
  15. 15.True or false: space between buttons is good button design. (a) True (b) False
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  17. 17.True or false: grey text on grey is poor button design. (a) True (b) False
  18. 18.True or false: a tiny 20 px button is good button design. (a) False (b) True
  19. 19.True or false: strong colour contrast is good button design. (a) False (b) True
  20. 20.🌗 Is black on yellow 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) yellow on white (b) dark blue on black (c) light grey on white (d) white on dark green
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 72 px tall
    Back button: 40 px tall
    Save button: 72 px tall     (a) Next (b) Send (c) Back (d) Save
  23. 23.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 60 px tall
    Save button: 48 px tall
    Done button: 52 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Next button: 60 px tall
    Cancel button: 52 px tall
    Help button: 56 px tall     (a) Help (b) Done (c) Next (d) Cancel
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 48 px tall
    Help button: 64 px tall
    Save button: 64 px tall
  28. 28.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) black on yellow (d) black on pale grey
  29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Save button: 52 px tall
    Send button: 48 px tall
    Cancel button: 40 px tall     (a) Save (b) Send (c) Back (d) Cancel
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 52 px tall
    Send button: 60 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Next button: 52 px tall
    Done button: 60 px tall
    Cancel button: 48 px tall     (a) Done (b) Cancel (c) Send (d) Next
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 40 px tall
    Start button: 40 px tall
    Help button: 36 px tall
  35. 35.True or false: strong colour contrast is poor button design. (a) False (b) True
  36. 36.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  38. 38.True or false: buttons almost touching is good button design. (a) False (b) True
  39. 39.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) black on pale grey (d) white on black
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Save button: 40 px tall
    Send button: 60 px tall
    Help button: 60 px tall

Answer key

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

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