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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 77 · 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: strong colour contrast? (a) poor design (b) good design
  2. 2.True or false: grey text on grey is good button design. (a) True (b) False
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 24 px tall
    Save button: 64 px tall
    Done button: 60 px tall     (a) Done (b) Save (c) Back (d) Send
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) white on dark green (c) yellow on white (d) pale pink on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Back button: 40 px tall
    Help button: 32 px tall
    Save button: 44 px tall
  6. 6.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 28 px tall
    Send button: 64 px tall     (a) Done (b) Start (c) Send
  8. 8.True or false: space between buttons is good button design. (a) True (b) False
  9. 9.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Send button: 64 px tall
    Save button: 28 px tall
    Start button: 48 px tall     (a) Cancel (b) Start (c) Send (d) Save
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 32 px tall
    Next button: 40 px tall
  12. 12.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.True or false: a big, easy tap area is poor button design. (a) True (b) False
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  17. 17.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) white on black
  18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Next button: 52 px tall
    Done button: 68 px tall     (a) Done (b) Next (c) Start
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Back button: 48 px tall
    Cancel button: 28 px tall     (a) Back (b) Help (c) Cancel
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Cancel button: 44 px tall
    Send button: 32 px tall
    Save button: 32 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Help button: 48 px tall
    Cancel button: 40 px tall
    Next button: 60 px tall     (a) Done (b) Next (c) Cancel (d) Help
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Start button: 56 px tall
    Save button: 44 px tall     (a) Save (b) Start (c) Cancel
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  28. 28.True or false: space between buttons is poor button design. (a) False (b) True
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Cancel button: 64 px tall
    Help button: 36 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Start button: 48 px tall
    Save button: 48 px tall
    Send button: 24 px tall     (a) Send (b) Done (c) Start (d) Save
  31. 31.True or false: buttons almost touching is poor button design. (a) True (b) False
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  33. 33.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  34. 34.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  35. 35.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 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?
    Save button: 60 px tall
    Next button: 60 px tall
    Help button: 28 px tall     (a) Help (b) Save (c) Next
  38. 38.Which colour pair is hard to read? (a) dark blue on white (b) light grey on white (c) white on dark green (d) black on pale grey
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Send button: 56 px tall
    Start button: 32 px tall
    Help button: 52 px tall     (a) Help (b) Send (c) Save (d) Start
  40. 40.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design

Answer key

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

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