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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 379 · 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?
    Save button: 36 px tall
    Send button: 48 px tall
    Back button: 52 px tall     (a) Back (b) Save (c) Send
  2. 2.True or false: a clear word like Save is poor button design. (a) True (b) False
  3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  6. 6.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on black (d) white on black
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 32 px tall
    Cancel button: 36 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Back button: 64 px tall
    Start button: 52 px tall     (a) Send (b) Back (c) Start
  9. 9.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  10. 10.True or false: strong colour contrast is good button design. (a) True (b) False
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Cancel button: 56 px tall
    Back button: 64 px tall
    Done button: 44 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Done button: 52 px tall
    Save button: 52 px tall     (a) Save (b) Done (c) Start
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 32 px tall
    Cancel button: 36 px tall
    Send button: 32 px tall
  15. 15.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) black on yellow (d) black on pale grey
  16. 16.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  17. 17.🌗 Is black on pale grey 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) True (b) False
  19. 19.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on pale grey (d) light grey on white
  20. 20.True or false: strong colour contrast is poor button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 44 px tall
    Help button: 40 px tall
    Next button: 40 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Save button: 32 px tall
    Cancel button: 60 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Send button: 64 px tall
    Cancel button: 36 px tall
  24. 24.True or false: a big, easy tap area is poor button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Back button: 68 px tall
    Save button: 64 px tall
    Next button: 32 px tall     (a) Back (b) Start (c) Next (d) Save
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Help button: 36 px tall
    Done button: 36 px tall
    Back button: 64 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Send button: 64 px tall
    Done button: 64 px tall     (a) Save (b) Done (c) Send
  29. 29.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on yellow (d) dark blue on white
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 56 px tall
    Help button: 40 px tall
  31. 31.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  32. 32.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) yellow on white (d) pale pink on white
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Start button: 56 px tall
    Cancel button: 48 px tall
    Done button: 40 px tall     (a) Cancel (b) Back (c) Start (d) Done
  34. 34.🌗 Is dark blue on black 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?
    Start button: 40 px tall
    Done button: 36 px tall
    Help button: 40 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Cancel button: 64 px tall
    Start button: 24 px tall     (a) Send (b) Start (c) Cancel
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Cancel button: 28 px tall
    Done button: 64 px tall     (a) Done (b) Help (c) Cancel
  38. 38.True or false: buttons almost touching is good button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Next button: 56 px tall
    Help button: 56 px tall
  40. 40.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) light grey on white (d) pale pink on white

Answer key

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

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