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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 549 · 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.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) pale pink on white (d) dark blue on black
  2. 2.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) white on dark green (d) pale pink on white
  3. 3.True or false: grey text on grey is poor button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Done button: 32 px tall
    Next button: 64 px tall
  5. 5.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Cancel button: 68 px tall
    Next button: 32 px tall
    Back button: 52 px tall     (a) Back (b) Cancel (c) Done (d) Next
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Done button: 52 px tall
    Send button: 40 px tall
  8. 8.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) dark blue on white (d) black on yellow
  9. 9.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.True or false: icons with no meaning is good button design. (a) False (b) True
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  13. 13.🌗 Is white on black 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. Which button is too small?
    Help button: 48 px tall
    Cancel button: 68 px tall
    Next button: 52 px tall
    Back button: 44 px tall     (a) Help (b) Back (c) Cancel (d) Next
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Start button: 32 px tall
    Back button: 36 px tall
    Send button: 48 px tall
  16. 16.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) black on pale grey
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 40 px tall
    Start button: 60 px tall
  18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 32 px tall
    Start button: 48 px tall
    Save button: 40 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 52 px tall
    Help button: 44 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  22. 22.True or false: space between buttons is good button design. (a) False (b) True
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Back button: 60 px tall
    Done button: 44 px tall
    Send button: 52 px tall     (a) Done (b) Help (c) Back (d) Send
  24. 24.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) light grey on white (d) dark blue on white
  25. 25.True or false: icons with no meaning is poor button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Cancel button: 64 px tall
    Done button: 60 px tall
    Start button: 36 px tall     (a) Done (b) Start (c) Save (d) Cancel
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Next button: 36 px tall
    Back button: 56 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 60 px tall
    Help button: 60 px tall
  29. 29.True or false: buttons almost touching is poor button design. (a) False (b) True
  30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Save button: 60 px tall
    Back button: 68 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Save (c) Done (d) Back
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 36 px tall
    Back button: 60 px tall
    Done button: 52 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Cancel button: 60 px tall
    Back button: 68 px tall     (a) Back (b) Cancel (c) Next
  34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Done button: 68 px tall
    Help button: 24 px tall     (a) Help (b) Back (c) Done
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 40 px tall
    Help button: 36 px tall
    Next button: 56 px tall

Answer key

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

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