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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 658 · 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.

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

Answer key

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

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