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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 306 · 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: a clear word like Save? (a) good design (b) poor design
  2. 2.True or false: strong colour contrast is good button design. (a) False (b) True
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  4. 4.True or false: grey text on grey is poor button design. (a) False (b) True
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  7. 7.True or false: a clear word like Save is poor button design. (a) False (b) True
  8. 8.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.True or false: icons with no meaning is poor button design. (a) False (b) True
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Next button: 44 px tall
    Cancel button: 60 px tall
    Send button: 48 px tall     (a) Next (b) Cancel (c) Back (d) Send
  11. 11.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) red on green (d) dark blue on white
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Save button: 72 px tall
    Next button: 44 px tall     (a) Next (b) Done (c) Save
  13. 13.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall
  16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 60 px tall
    Send button: 28 px tall
    Back button: 72 px tall     (a) Save (b) Help (c) Send (d) Back
  18. 18.True or false: strong colour contrast is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  21. 21.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  23. 23.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) red on green (d) yellow on white
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 52 px tall
    Done button: 64 px tall
    Help button: 64 px tall
  25. 25.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Back button: 56 px tall
    Help button: 56 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
    Send button: 56 px tall
    Back button: 48 px tall
    Next button: 36 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  29. 29.True or false: space between buttons is poor button design. (a) False (b) True
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 32 px tall
    Start button: 48 px tall     (a) Save (b) Done (c) Start
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Help button: 36 px tall
    Send button: 60 px tall
    Start button: 40 px tall
  32. 32.True or false: icons with no meaning is good button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Start button: 36 px tall
    Next button: 40 px tall
    Help button: 48 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 40 px tall
    Help button: 52 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Next button: 44 px tall
    Cancel button: 56 px tall     (a) Cancel (b) Save (c) Next
  36. 36.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  37. 37.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) white on black (d) black on yellow
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 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: 24 px tall
    Help button: 52 px tall
    Start button: 56 px tall
    Cancel button: 72 px tall     (a) Save (b) Cancel (c) Start (d) Help
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Help button: 48 px tall
    Done button: 52 px tall     (a) Help (b) Done (c) Send

Answer key

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

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