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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 530 · 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: space between buttons? (a) good design (b) poor design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Send button: 40 px tall
    Cancel button: 60 px tall
    Done button: 72 px tall     (a) Cancel (b) Next (c) Send (d) Done
  4. 4.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Next button: 68 px tall
    Back button: 52 px tall
    Save button: 36 px tall     (a) Back (b) Save (c) Next (d) Done
  6. 6.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  7. 7.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Back button: 48 px tall
    Cancel button: 36 px tall     (a) Cancel (b) Start (c) Back
  9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  10. 10.True or false: a clear word like Save is poor button design. (a) True (b) False
  11. 11.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on yellow (d) yellow on white
  12. 12.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) light grey on white (d) yellow on white
  13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  17. 17.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.True or false: icons with no meaning is good button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  20. 20.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Help button: 36 px tall
    Done button: 40 px tall
    Next button: 40 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Done button: 64 px tall
    Send button: 72 px tall     (a) Send (b) Done (c) Next
  23. 23.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) dark blue on white
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Back button: 32 px tall
    Done button: 44 px tall
    Cancel button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Save button: 56 px tall
    Cancel button: 48 px tall
    Done button: 36 px tall
  26. 26.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 36 px tall
    Cancel button: 64 px tall
    Done button: 68 px tall     (a) Cancel (b) Save (c) Done (d) Help
  28. 28.Which colour pair is easy to read? (a) white on black (b) red on green (c) pale pink on white (d) light grey on white
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 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?
    Cancel button: 48 px tall
    Help button: 40 px tall
    Send button: 32 px tall
  31. 31.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on black (d) white on dark green
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 32 px tall
    Start button: 68 px tall     (a) Cancel (b) Start (c) Send
  33. 33.True or false: a clear word like Save is good button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Back button: 52 px tall
    Start button: 44 px tall
    Cancel button: 56 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Save button: 48 px tall
    Start button: 64 px tall
    Cancel button: 60 px tall     (a) Save (b) Cancel (c) Start (d) Next
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Send button: 60 px tall
    Back button: 56 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  39. 39.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) white on dark green (d) pale pink on white
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Send button: 72 px tall
    Next button: 44 px tall
    Back button: 52 px tall     (a) Next (b) Back (c) Cancel (d) Send

Answer key

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

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