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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 651 · 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. How many of these buttons follow the rule?
    Send button: 44 px tall
    Cancel button: 32 px tall
    Next button: 36 px tall
    Done button: 32 px tall
  2. 2.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  5. 5.True or false: grey text on grey is good button design. (a) True (b) False
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Start button: 36 px tall
    Next button: 64 px tall     (a) Save (b) Next (c) Start
  7. 7.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) white on black (d) dark blue on black
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  9. 9.True or false: grey text on grey is poor button design. (a) False (b) True
  10. 10.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 64 px tall
    Next button: 44 px tall     (a) Save (b) Cancel (c) Next
  12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 44 px tall
    Save button: 52 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Start button: 60 px tall
    Help button: 52 px tall
    Cancel button: 44 px tall     (a) Start (b) Help (c) Back (d) Cancel
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 32 px tall
    Start button: 48 px tall     (a) Send (b) Cancel (c) Start
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  18. 18.True or false: buttons almost touching is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Back button: 24 px tall
    Save button: 48 px tall     (a) Save (b) Done (c) Back
  20. 20.True or false: a big, easy tap area is poor button design. (a) True (b) False
  21. 21.True or false: strong colour contrast is poor button design. (a) True (b) False
  22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 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?
    Start button: 48 px tall
    Next button: 36 px tall
    Back button: 72 px tall
    Done button: 56 px tall     (a) Start (b) Next (c) Done (d) Back
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Save button: 64 px tall
    Next button: 48 px tall     (a) Back (b) Next (c) Save
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 72 px tall
    Back button: 36 px tall     (a) Cancel (b) Next (c) Back
  27. 27.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on white (d) light grey on white
  28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) dark blue on black (d) yellow on white
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 56 px tall
    Start button: 36 px tall
    Save button: 40 px tall
  31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Send button: 52 px tall
    Back button: 60 px tall     (a) Send (b) Back (c) Help
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Back button: 32 px tall
    Next button: 64 px tall
    Send button: 48 px tall     (a) Next (b) Cancel (c) Send (d) Back
  35. 35.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) light grey on white (d) yellow on white
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Help button: 40 px tall
    Start button: 32 px tall
    Back button: 44 px tall
  37. 37.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Done button: 60 px tall
    Next button: 24 px tall     (a) Next (b) Send (c) Done
  39. 39.True or false: buttons almost touching is good button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 52 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall

Answer key

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

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