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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 450 · 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.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.True or false: space between buttons is poor button design. (a) False (b) True
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Send button: 52 px tall
    Help button: 68 px tall
    Back button: 52 px tall     (a) Save (b) Send (c) Back (d) Help
  4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 52 px tall
    Next button: 40 px tall
  6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.True or false: a big, easy tap area is poor button design. (a) False (b) True
  8. 8.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) dark blue on black (d) pale pink on white
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Back button: 48 px tall
    Start button: 60 px tall
    Save button: 48 px tall     (a) Back (b) Start (c) Save (d) Done
  10. 10.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Back button: 48 px tall
    Cancel button: 52 px tall     (a) Next (b) Cancel (c) Back
  13. 13.True or false: a clear word like Save is good button design. (a) False (b) True
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Back button: 32 px tall
    Start button: 36 px tall
  15. 15.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Help button: 68 px tall
    Done button: 60 px tall
    Next button: 52 px tall     (a) Done (b) Next (c) Help (d) Start
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Help button: 40 px tall
    Next button: 60 px tall
    Back button: 48 px tall     (a) Next (b) Save (c) Help (d) Back
  18. 18.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Save button: 36 px tall
    Done button: 44 px tall
    Help button: 52 px tall
  20. 20.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Cancel button: 52 px tall
    Back button: 64 px tall
    Help button: 52 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 36 px tall
    Help button: 44 px tall
    Cancel button: 64 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Send button: 56 px tall
    Save button: 68 px tall
    Done button: 36 px tall     (a) Send (b) Save (c) Help (d) Done
  25. 25.True or false: strong colour contrast is good button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Cancel button: 64 px tall
    Save button: 32 px tall
  27. 27.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) red on green (d) light grey on white
  28. 28.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) white on dark green (d) black on pale grey
  29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.True or false: icons with no meaning is poor button design. (a) True (b) False
  31. 31.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  32. 32.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  33. 33.True or false: a big, easy tap area 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?
    Start button: 36 px tall
    Done button: 52 px tall
    Save button: 36 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Done button: 64 px tall
    Start button: 32 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Next button: 56 px tall
    Back button: 52 px tall
    Start button: 36 px tall     (a) Start (b) Next (c) Save (d) Back
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Done button: 24 px tall
    Send button: 64 px tall     (a) Back (b) Send (c) Done
  38. 38.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  39. 39.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  40. 40.True or false: a tiny 20 px button is good button design. (a) True (b) False

Answer key

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

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