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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 509 · 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: grey text on grey is poor button design. (a) False (b) True
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 68 px tall
    Cancel button: 24 px tall     (a) Next (b) Save (c) Cancel
  3. 3.Which colour pair is hard to read? (a) dark blue on black (b) black on yellow (c) dark blue on white (d) white on dark green
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Send button: 44 px tall
    Save button: 32 px tall
    Cancel button: 48 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Start button: 52 px tall
    Next button: 32 px tall     (a) Done (b) Start (c) Next
  6. 6.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  9. 9.True or false: strong colour contrast is good button design. (a) True (b) False
  10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Next button: 72 px tall
    Save button: 60 px tall     (a) Start (b) Save (c) Next
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 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?
    Cancel button: 48 px tall
    Help button: 36 px tall
    Save button: 52 px tall
    Back button: 52 px tall     (a) Save (b) Back (c) Help (d) Cancel
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Next button: 64 px tall
    Cancel button: 32 px tall
    Save button: 56 px tall
  16. 16.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) dark blue on white (d) yellow on white
  17. 17.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.True or false: icons with no meaning is good button design. (a) True (b) False
  19. 19.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  22. 22.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) dark blue on black (d) yellow on white
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Send button: 64 px tall
    Save button: 64 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 24 px tall
    Cancel button: 68 px tall
    Help button: 56 px tall     (a) Help (b) Send (c) Cancel (d) Back
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Done button: 24 px tall
    Help button: 64 px tall     (a) Back (b) Help (c) Done
  26. 26.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) black on yellow (d) yellow on white
  27. 27.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Cancel button: 68 px tall
    Save button: 72 px tall     (a) Next (b) Save (c) Cancel
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 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?
    Back button: 44 px tall
    Save button: 64 px tall
    Help button: 56 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  33. 33.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Send button: 52 px tall
    Cancel button: 36 px tall
  35. 35.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Save button: 52 px tall
    Done button: 44 px tall
    Cancel button: 52 px tall     (a) Save (b) Send (c) Done (d) Cancel
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Done button: 40 px tall
    Cancel button: 52 px tall
    Send button: 64 px tall     (a) Send (b) Done (c) Cancel (d) Start
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 56 px tall
    Next button: 64 px tall
  39. 39.True or false: grey text on grey is good button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 48 px tall
    Start button: 64 px tall

Answer key

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

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