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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 81 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Send button: 64 px tall
    Save button: 68 px tall
    Done button: 56 px tall     (a) Send (b) Save (c) Next (d) Done
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 44 px tall
    Done button: 48 px tall
    Save button: 60 px tall     (a) Send (b) Save (c) Help (d) Done
  3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  4. 4.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) red on green (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.True or false: a big, easy tap area is poor button design. (a) False (b) True
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  8. 8.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) yellow on white (d) pale pink on white
  9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Next button: 48 px tall
    Send button: 60 px tall
    Help button: 64 px tall     (a) Next (b) Help (c) Send (d) Cancel
  11. 11.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) black on yellow (d) red on green
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Start button: 72 px tall
    Send button: 28 px tall
    Cancel button: 64 px tall     (a) Send (b) Cancel (c) Start (d) Done
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Next button: 36 px tall
    Help button: 68 px tall
    Save button: 72 px tall     (a) Save (b) Done (c) Help (d) Next
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 64 px tall
    Back button: 60 px tall
    Cancel button: 36 px tall     (a) Save (b) Cancel (c) Back (d) Next
  17. 17.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Start button: 56 px tall
    Back button: 56 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Send button: 52 px tall
    Save button: 40 px tall     (a) Help (b) Send (c) Save
  21. 21.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on white (c) red on green (d) light grey on white
  22. 22.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) red on green (d) pale pink on white
  23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Cancel button: 40 px tall
    Help button: 60 px tall
  25. 25.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) dark blue on black (d) black on pale grey
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 64 px tall
    Cancel button: 44 px tall
    Save button: 32 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 52 px tall
    Help button: 56 px tall
    Start button: 36 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Done button: 24 px tall
    Send button: 52 px tall     (a) Done (b) Start (c) Send
  29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.True or false: strong colour contrast is poor button design. (a) False (b) True
  31. 31.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) dark blue on white (d) white on dark green
  32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  34. 34.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Send button: 36 px tall
    Start button: 56 px tall
    Save button: 44 px tall
  36. 36.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) white on dark green (d) dark blue on black
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Save button: 36 px tall
    Next button: 52 px tall
    Cancel button: 52 px tall     (a) Back (b) Cancel (c) Save (d) Next
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Send button: 52 px tall
    Done button: 60 px tall     (a) Back (b) Done (c) Send
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 48 px tall
    Back button: 40 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Save button: 64 px tall
    Next button: 72 px tall
    Back button: 48 px tall     (a) Help (b) Save (c) Back (d) Next

Answer key

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

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