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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 675 · 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: grey text on grey is poor button design. (a) True (b) False
  2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Done button: 52 px tall
    Next button: 52 px tall
    Back button: 72 px tall     (a) Save (b) Next (c) Done (d) Back
  4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  8. 8.True or false: strong colour contrast is good button design. (a) False (b) True
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Next button: 32 px tall
    Send button: 52 px tall     (a) Send (b) Next (c) Start
  10. 10.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  11. 11.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) red on green (d) dark blue on black
  13. 13.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) light grey on white (d) white on black
  14. 14.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  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. The Save button is 40 px tall. How many px taller must it be?
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Start button: 56 px tall
    Cancel button: 36 px tall
    Back button: 48 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 44 px tall
    Help button: 36 px tall
  21. 21.True or false: grey text on grey is good button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Next button: 64 px tall
    Done button: 64 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Next (c) Done (d) Save
  23. 23.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on black (d) white on dark green
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Back button: 48 px tall
    Save button: 36 px tall
    Help button: 60 px tall     (a) Send (b) Back (c) Save (d) Help
  25. 25.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) yellow on white
  26. 26.True or false: icons with no meaning is good button design. (a) False (b) True
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 40 px tall
    Send button: 48 px tall
    Help button: 56 px tall     (a) Help (b) Save (c) Send (d) Start
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Save button: 68 px tall
    Back button: 60 px tall     (a) Save (b) Back (c) Next
  29. 29.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Send button: 60 px tall
    Cancel button: 44 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 64 px tall
    Send button: 56 px tall
    Save button: 44 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 56 px tall
    Save button: 60 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 40 px tall
    Back button: 72 px tall     (a) Save (b) Back (c) Cancel
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Next button: 32 px tall
    Back button: 32 px tall
  39. 39.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) white on black (d) black on pale grey
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Help button: 40 px tall
    Send button: 44 px tall

Answer key

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

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