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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 506 · 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. Which button is too small?
    Done button: 68 px tall
    Help button: 24 px tall
    Save button: 68 px tall     (a) Help (b) Done (c) Save
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  4. 4.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) black on yellow (d) light grey on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Help button: 64 px tall
    Start button: 52 px tall     (a) Start (b) Help (c) Save
  6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Done button: 56 px tall
    Send button: 32 px tall
    Next button: 44 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 36 px tall
    Next button: 64 px tall
    Send button: 60 px tall     (a) Send (b) Cancel (c) Next (d) Back
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 60 px tall
    Back button: 32 px tall
    Done button: 40 px tall
  11. 11.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Back button: 48 px tall
    Start button: 36 px tall     (a) Cancel (b) Start (c) Back
  13. 13.True or false: strong colour contrast is poor button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Back button: 52 px tall
    Start button: 48 px tall     (a) Back (b) Save (c) Start
  15. 15.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Next button: 68 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Next (c) Save
  20. 20.True or false: a clear word like Save is poor button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Start button: 40 px tall
    Help button: 32 px tall
    Save button: 60 px tall
  23. 23.True or false: a big, easy tap area is good button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Help button: 64 px tall
    Save button: 44 px tall
  25. 25.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 48 px tall
    Back button: 36 px tall     (a) Save (b) Start (c) Back
  27. 27.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on pale grey (d) black on yellow
  28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  29. 29.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) pale pink on white
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Save button: 36 px tall
    Start button: 36 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Start button: 56 px tall
    Cancel button: 32 px tall
  32. 32.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on black (d) pale pink on white
  33. 33.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) red on green (d) black on pale grey
  34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Start button: 56 px tall
    Save button: 40 px tall
    Send button: 56 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Send button: 36 px tall
    Save button: 56 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Start button: 28 px tall
    Help button: 72 px tall
    Done button: 52 px tall     (a) Done (b) Back (c) Start (d) Help
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Start button: 68 px tall
    Next button: 64 px tall
    Help button: 64 px tall     (a) Start (b) Next (c) Cancel (d) Help
  40. 40.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read

Answer key

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

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