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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 541 · 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.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  2. 2.True or false: strong colour contrast is poor button design. (a) True (b) False
  3. 3.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) red on green (d) light grey on white
  5. 5.True or false: a tiny 20 px button is good button design. (a) True (b) False
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Help button: 32 px tall
    Done button: 36 px tall
  7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Help button: 64 px tall
    Back button: 56 px tall
    Cancel button: 56 px tall     (a) Help (b) Back (c) Save (d) Cancel
  10. 10.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) white on dark green (d) pale pink on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Done button: 28 px tall
    Next button: 52 px tall
    Save button: 64 px tall     (a) Done (b) Cancel (c) Save (d) Next
  12. 12.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) black on yellow
  13. 13.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
  15. 15.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) white on dark green
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Next button: 52 px tall
    Help button: 44 px tall
    Start button: 64 px tall     (a) Start (b) Help (c) Next (d) Send
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Cancel button: 72 px tall
    Done button: 68 px tall
    Back button: 60 px tall     (a) Done (b) Back (c) Save (d) Cancel
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Next button: 32 px tall
    Done button: 44 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Help button: 64 px tall
    Back button: 64 px tall     (a) Save (b) Back (c) Help
  21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 56 px tall
    Done button: 32 px tall
  23. 23.True or false: space between buttons is poor button design. (a) False (b) True
  24. 24.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on white (d) dark blue on black
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 64 px tall
    Next button: 44 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Start button: 44 px tall
    Help button: 64 px tall
  27. 27.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Done button: 60 px tall
    Start button: 36 px tall
    Save button: 64 px tall
  29. 29.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) yellow on white (d) dark blue on white
  30. 30.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  31. 31.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) red on green (d) yellow on white
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 32 px tall
    Send button: 40 px tall
    Help button: 32 px tall
  33. 33.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.True or false: grey text on grey is poor button design. (a) False (b) True
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Cancel button: 40 px tall
    Save button: 52 px tall
    Done button: 40 px tall
  37. 37.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 48 px tall
    Cancel button: 56 px tall
  40. 40.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) white on dark green (d) white on black

Answer key

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

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