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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 169 · 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. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 64 px tall
    Cancel button: 56 px tall
    Back button: 60 px tall
  2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  4. 4.Which colour pair is hard to read? (a) white on dark green (b) light grey on white (c) black on yellow (d) black on pale grey
  5. 5.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  7. 7.Which colour pair is hard to read? (a) black on yellow (b) yellow on white (c) dark blue on white (d) black on pale grey
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 48 px tall
    Next button: 44 px tall
  10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 28 px tall
    Next button: 60 px tall
    Send button: 52 px tall     (a) Send (b) Help (c) Done (d) Next
  12. 12.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  13. 13.True or false: icons with no meaning is poor button design. (a) False (b) True
  14. 14.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 44 px tall
    Done button: 68 px tall     (a) Done (b) Help (c) Cancel
  17. 17.True or false: space between buttons is good button design. (a) False (b) True
  18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  19. 19.True or false: grey text on grey is poor button design. (a) False (b) True
  20. 20.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  21. 21.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) light grey on white (d) red on green
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Save button: 32 px tall
    Back button: 68 px tall
    Done button: 68 px tall     (a) Done (b) Help (c) Back (d) Save
  23. 23.True or false: a big, easy tap area is good button design. (a) False (b) True
  24. 24.True or false: buttons almost touching is poor button design. (a) False (b) True
  25. 25.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.True or false: a tiny 20 px button is good button design. (a) False (b) True
  27. 27.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) dark blue on white (d) white on black
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Send button: 48 px tall
    Cancel button: 40 px tall
    Back button: 40 px tall
  29. 29.True or false: space between buttons is poor button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Send button: 32 px tall
    Help button: 44 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Next button: 52 px tall
    Save button: 48 px tall
    Cancel button: 60 px tall     (a) Save (b) Cancel (c) Next (d) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Save button: 64 px tall
    Next button: 68 px tall
    Cancel button: 24 px tall     (a) Next (b) Cancel (c) Start (d) Save
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 40 px tall
    Send button: 32 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Send button: 60 px tall
    Cancel button: 24 px tall     (a) Cancel (b) Send (c) Start
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 32 px tall
    Next button: 44 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Save button: 48 px tall
    Cancel button: 32 px tall
    Start button: 48 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Send button: 48 px tall
    Done button: 36 px tall
    Back button: 64 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Cancel button: 56 px tall
    Next button: 72 px tall
    Done button: 68 px tall     (a) Cancel (b) Back (c) Done (d) Next

Answer key

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

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