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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 150 · 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.

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

Answer key

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

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