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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 668 · 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?
    Done button: 24 px tall
    Next button: 52 px tall
    Back button: 60 px tall     (a) Back (b) Next (c) Done
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 64 px tall
    Send button: 64 px tall
    Start button: 36 px tall     (a) Save (b) Start (c) Send (d) Cancel
  6. 6.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) yellow on white
  8. 8.True or false: strong colour contrast is poor button design. (a) False (b) True
  9. 9.True or false: space between buttons is good button design. (a) True (b) False
  10. 10.True or false: a big, easy tap area is poor button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Cancel button: 52 px tall
    Done button: 48 px tall
    Start button: 64 px tall     (a) Done (b) Start (c) Cancel (d) Next
  12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Next button: 72 px tall
    Save button: 64 px tall
    Help button: 44 px tall     (a) Save (b) Back (c) Next (d) Help
  14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Back button: 52 px tall
    Save button: 44 px tall
  16. 16.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) red on green (d) black on yellow
  18. 18.True or false: icons with no meaning is poor button design. (a) True (b) False
  19. 19.True or false: buttons almost touching is poor button design. (a) False (b) True
  20. 20.True or false: a tiny 20 px button is good button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Help button: 64 px tall
    Start button: 36 px tall
  22. 22.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) dark blue on black
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Done button: 48 px tall
    Next button: 52 px tall
    Send button: 64 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Next button: 36 px tall
    Back button: 60 px tall     (a) Send (b) Back (c) Next
  25. 25.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Help button: 68 px tall
    Save button: 36 px tall     (a) Back (b) Help (c) Save
  27. 27.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Next button: 60 px tall
    Back button: 64 px tall
    Cancel button: 56 px tall     (a) Cancel (b) Back (c) Next (d) Done
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Send button: 36 px tall
    Start button: 68 px tall
    Help button: 48 px tall     (a) Next (b) Help (c) Send (d) Start
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Back button: 64 px tall
    Start button: 52 px tall
    Save button: 72 px tall     (a) Back (b) Help (c) Save (d) Start
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  32. 32.True or false: a clear word like Save is good button design. (a) False (b) True
  33. 33.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) red on green (d) white on dark green
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 48 px tall
    Back button: 28 px tall     (a) Done (b) Back (c) Save
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 28 px tall
    Send button: 52 px tall     (a) Cancel (b) Next (c) Send
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Start button: 36 px tall
    Send button: 40 px tall
    Next button: 56 px tall
  37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Help button: 48 px tall
    Send button: 60 px tall     (a) Help (b) Send (c) Save
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?

Answer key

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

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