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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 69 · 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: icons with no meaning is poor button design. (a) False (b) True
  2. 2.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.True or false: buttons almost touching is poor button design. (a) False (b) True
  6. 6.True or false: grey text on grey is poor button design. (a) True (b) False
  7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Cancel button: 36 px tall
    Done button: 52 px tall     (a) Cancel (b) Done (c) Send
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Help button: 60 px tall
    Done button: 40 px tall
    Send button: 60 px tall
  10. 10.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  11. 11.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) black on pale grey (d) dark blue on black
  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.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Help button: 52 px tall
    Done button: 52 px tall
    Save button: 40 px tall
  15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 28 px tall
    Send button: 48 px tall
    Start button: 68 px tall     (a) Help (b) Send (c) Save (d) Start
  18. 18.🔘 Is this good or poor button design: grey text on grey? (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?
    Start button: 36 px tall
    Done button: 48 px tall
    Next button: 56 px tall
    Back button: 60 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Start button: 40 px tall
    Next button: 64 px tall
  22. 22.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 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?
    Send button: 72 px tall
    Back button: 24 px tall
    Cancel button: 72 px tall
    Next button: 56 px tall     (a) Cancel (b) Next (c) Send (d) Back
  25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on black (d) black on yellow
  27. 27.True or false: a clear word like Save is poor button design. (a) True (b) False
  28. 28.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Send button: 52 px tall
    Cancel button: 64 px tall     (a) Send (b) Help (c) Cancel
  31. 31.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
  32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  33. 33.True or false: a big, easy tap area is good button design. (a) False (b) True
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Cancel button: 64 px tall
    Next button: 32 px tall
    Help button: 40 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Back button: 52 px tall
    Next button: 64 px tall
    Done button: 40 px tall     (a) Next (b) Done (c) Start (d) Back
  36. 36.True or false: space between buttons is good button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Send button: 32 px tall
    Save button: 36 px tall
    Cancel button: 36 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Cancel button: 40 px tall
    Help button: 36 px tall
  40. 40.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design

Answer key

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

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