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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 41 · 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 good button design. (a) False (b) True
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 36 px tall
    Back button: 48 px tall
  3. 3.True or false: a big, easy tap area is poor button design. (a) True (b) False
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Cancel button: 64 px tall
    Next button: 24 px tall
    Save button: 72 px tall     (a) Back (b) Cancel (c) Next (d) Save
  5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 48 px tall
    Send button: 52 px tall
    Cancel button: 48 px tall     (a) Next (b) Done (c) Send (d) Cancel
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Back button: 32 px tall
    Help button: 72 px tall     (a) Back (b) Help (c) Send
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 64 px tall
    Next button: 24 px tall     (a) Next (b) Done (c) Cancel
  9. 9.True or false: a tiny 20 px button is good button design. (a) False (b) True
  10. 10.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) white on dark green (d) pale pink on white
  11. 11.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Send button: 72 px tall
    Cancel button: 44 px tall
    Done button: 64 px tall     (a) Done (b) Next (c) Cancel (d) Send
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 36 px tall
    Next button: 48 px tall
    Cancel button: 36 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Done button: 52 px tall
    Next button: 24 px tall
    Save button: 68 px tall     (a) Done (b) Save (c) Next (d) Cancel
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 40 px tall
    Start button: 60 px tall     (a) Cancel (b) Save (c) Start
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 68 px tall
    Save button: 36 px tall     (a) Next (b) Save (c) Help
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 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?
    Back button: 48 px tall
    Done button: 64 px tall
    Help button: 52 px tall
  19. 19.True or false: a clear word like Save is poor button design. (a) True (b) False
  20. 20.True or false: buttons almost touching is poor button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Done button: 44 px tall
    Save button: 36 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 60 px tall
    Cancel button: 32 px tall
  23. 23.True or false: space between buttons is good button design. (a) False (b) True
  24. 24.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) pale pink on white (d) light grey on white
  25. 25.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) yellow on white
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Save button: 48 px tall
    Start button: 48 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 60 px tall
    Next button: 52 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 48 px tall
    Next button: 56 px tall
    Start button: 64 px tall
  29. 29.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) red on green
  30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.🔘 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: 36 px tall
    Send button: 68 px tall     (a) Next (b) Send (c) Cancel (d) Save
  32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) light grey on white (d) yellow on white
  34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 72 px tall
    Start button: 44 px tall     (a) Start (b) Save (c) Cancel
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 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?
    Done button: 68 px tall
    Save button: 60 px tall
    Cancel button: 44 px tall
    Help button: 68 px tall     (a) Cancel (b) Done (c) Help (d) Save
  39. 39.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 44 px tall
    Done button: 60 px tall

Answer key

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

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