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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 557 · 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: a clear word like Save? (a) poor design (b) good design
  2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  3. 3.True or false: buttons almost touching is poor button design. (a) True (b) False
  4. 4.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on black (d) black on yellow
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  6. 6.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) red on green (d) white on dark green
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Start button: 56 px tall
    Cancel button: 24 px tall     (a) Cancel (b) Next (c) Start
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 52 px tall
    Save button: 36 px tall
    Next button: 52 px tall     (a) Save (b) Next (c) Help (d) Cancel
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Cancel button: 60 px tall
    Start button: 36 px tall
    Done button: 68 px tall     (a) Done (b) Start (c) Cancel (d) Help
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Cancel button: 72 px tall
    Send button: 72 px tall     (a) Send (b) Cancel (c) Back
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 64 px tall
    Help button: 32 px tall
  12. 12.True or false: strong colour contrast is poor button design. (a) True (b) False
  13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Next button: 44 px tall
    Back button: 48 px tall
    Send button: 48 px tall
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Back button: 48 px tall
    Save button: 64 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 64 px tall
    Help button: 60 px tall
    Start button: 44 px tall     (a) Start (b) Help (c) Next (d) Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Start button: 64 px tall
    Send button: 52 px tall
    Back button: 44 px tall     (a) Start (b) Back (c) Send (d) Next
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 56 px tall
    Done button: 56 px tall     (a) Help (b) Cancel (c) Done
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Start button: 36 px tall
    Save button: 40 px tall
  20. 20.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Back button: 36 px tall
    Cancel button: 40 px tall
    Help button: 48 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Done button: 40 px tall
    Cancel button: 52 px tall
    Next button: 32 px tall
  23. 23.True or false: grey text on grey is good button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Cancel button: 56 px tall
    Done button: 32 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Done button: 64 px tall
    Help button: 56 px tall
    Send button: 48 px tall     (a) Help (b) Done (c) Send (d) Back
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Back button: 40 px tall
    Cancel button: 52 px tall
    Save button: 40 px tall
  27. 27.Which colour pair is hard to read? (a) black on pale grey (b) light grey on white (c) white on dark green (d) white on black
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Back button: 68 px tall
    Send button: 36 px tall     (a) Done (b) Back (c) Send
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 48 px tall
    Save button: 64 px tall     (a) Next (b) Save (c) Send
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Save button: 52 px tall
    Done button: 48 px tall
    Next button: 52 px tall     (a) Next (b) Start (c) Save (d) Done
  31. 31.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) red on green
  32. 32.True or false: a big, easy tap area is good button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Help button: 52 px tall
    Save button: 48 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Start button: 24 px tall
    Save button: 48 px tall
    Back button: 72 px tall     (a) Cancel (b) Save (c) Start (d) Back
  35. 35.True or false: a clear word like Save is good button design. (a) True (b) False
  36. 36.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) dark blue on black
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  39. 39.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on white (d) dark blue on black
  40. 40.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) yellow on white

Answer key

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

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