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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 393 · 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.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  3. 3.Which colour pair is hard to read? (a) white on black (b) red on green (c) dark blue on white (d) white on dark green
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Start button: 52 px tall
    Save button: 48 px tall
    Send button: 64 px tall     (a) Send (b) Save (c) Back (d) Start
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 40 px tall
    Send button: 56 px tall
    Start button: 56 px tall     (a) Send (b) Done (c) Save (d) Start
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Cancel button: 48 px tall
    Start button: 56 px tall
    Help button: 52 px tall     (a) Cancel (b) Save (c) Start (d) Help
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Back button: 40 px tall
    Help button: 72 px tall     (a) Start (b) Help (c) Back
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 60 px tall
    Save button: 32 px tall
    Done button: 64 px tall
  11. 11.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  12. 12.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Back button: 60 px tall
    Save button: 40 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Next button: 60 px tall
    Done button: 36 px tall     (a) Send (b) Next (c) Done
  16. 16.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) yellow on white (d) red on green
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Next button: 72 px tall
    Help button: 64 px tall
    Back button: 40 px tall     (a) Cancel (b) Back (c) Help (d) Next
  18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Help button: 36 px tall
    Next button: 36 px tall
    Back button: 44 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  21. 21.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) light grey on white (d) dark blue on black
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 28 px tall
    Start button: 64 px tall     (a) Cancel (b) Save (c) Start
  24. 24.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) black on pale grey (d) dark blue on black
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Back button: 40 px tall
    Save button: 64 px tall
  27. 27.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) dark blue on black
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 56 px tall
    Cancel button: 60 px tall
    Save button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Done button: 48 px tall
    Send button: 52 px tall
    Back button: 56 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  31. 31.True or false: a tiny 20 px button is good button design. (a) True (b) False
  32. 32.True or false: buttons almost touching is good button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Help button: 56 px tall
    Cancel button: 24 px tall
    Save button: 56 px tall     (a) Help (b) Save (c) Cancel (d) Start
  34. 34.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) yellow on white (d) pale pink on white
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  36. 36.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) white on dark green (d) black on pale grey
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Save button: 60 px tall
    Done button: 44 px tall
    Cancel button: 64 px tall     (a) Cancel (b) Help (c) Save (d) Done
  38. 38.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Done button: 32 px tall
    Cancel button: 40 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 64 px tall
    Start button: 24 px tall     (a) Help (b) Start (c) Save

Answer key

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

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