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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 529 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Back button: 56 px tall
    Send button: 52 px tall
    Save button: 68 px tall     (a) Send (b) Save (c) Next (d) Back
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Start button: 52 px tall
    Send button: 60 px tall
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  5. 5.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  6. 6.True or false: a big, easy tap area is poor button design. (a) True (b) False
  7. 7.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) white on black
  8. 8.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  11. 11.True or false: icons with no meaning is poor button design. (a) True (b) False
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 52 px tall
    Cancel button: 64 px tall
    Back button: 44 px tall     (a) Help (b) Cancel (c) Send (d) Back
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 36 px tall
    Next button: 32 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Save button: 52 px tall
    Help button: 68 px tall
    Cancel button: 40 px tall     (a) Send (b) Help (c) Cancel (d) Save
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Done button: 40 px tall
    Help button: 60 px tall
    Send button: 56 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Done button: 24 px tall
    Start button: 60 px tall     (a) Done (b) Next (c) Start
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Cancel button: 36 px tall
    Next button: 56 px tall
    Help button: 72 px tall     (a) Help (b) Done (c) Next (d) Cancel
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Next button: 48 px tall
    Back button: 48 px tall
    Help button: 48 px tall     (a) Help (b) Save (c) Back (d) Next
  19. 19.True or false: grey text on grey is poor button design. (a) True (b) False
  20. 20.True or false: a clear word like Save is good button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Help button: 44 px tall
    Cancel button: 64 px tall     (a) Done (b) Help (c) Cancel
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Send button: 64 px tall
    Cancel button: 56 px tall     (a) Send (b) Save (c) Cancel
  23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  24. 24.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) white on dark green (d) black on pale grey
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Next button: 64 px tall
    Back button: 56 px tall     (a) Back (b) Next (c) Cancel
  27. 27.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) white on black (d) black on yellow
  28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  31. 31.Which colour pair is easy to read? (a) dark blue on white (b) light grey on white (c) pale pink on white (d) dark blue on black
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  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?
    Done button: 60 px tall
    Cancel button: 68 px tall
    Back button: 60 px tall
    Help button: 32 px tall     (a) Back (b) Help (c) Cancel (d) Done
  36. 36.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Next button: 48 px tall
    Save button: 68 px tall     (a) Save (b) Send (c) Next
  38. 38.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) dark blue on black
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Save button: 44 px tall
    Done button: 52 px tall     (a) Done (b) Next (c) Save
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 64 px tall
    Next button: 56 px tall
    Back button: 56 px tall

Answer key

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

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