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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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