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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 489 · 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: space between buttons is poor button design. (a) False (b) True
  2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  3. 3.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  4. 4.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) white on dark green (d) white on black
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Cancel button: 48 px tall
    Save button: 72 px tall     (a) Cancel (b) Save (c) Done
  6. 6.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 44 px tall
    Help button: 64 px tall     (a) Help (b) Save (c) Send
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Save button: 44 px tall
    Send button: 40 px tall
  9. 9.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  11. 11.🌗 Is black on yellow 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. How many of these buttons follow the rule?
    Save button: 32 px tall
    Back button: 60 px tall
    Help button: 44 px tall
    Start button: 64 px tall
  13. 13.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  14. 14.True or false: grey text on grey is good button design. (a) False (b) True
  15. 15.True or false: a clear word like Save is good button design. (a) False (b) True
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
  18. 18.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  19. 19.True or false: a big, easy tap area is poor button design. (a) False (b) True
  20. 20.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 36 px tall
    Next button: 64 px tall
    Help button: 56 px tall
    Back button: 52 px tall     (a) Next (b) Help (c) Back (d) Start
  22. 22.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Send button: 56 px tall
    Done button: 36 px tall
  24. 24.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  26. 26.True or false: a tiny 20 px button is good button design. (a) False (b) True
  27. 27.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) white on dark green (d) black on pale grey
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Save button: 68 px tall
    Start button: 52 px tall
    Send button: 36 px tall     (a) Save (b) Start (c) Send (d) Done
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 64 px tall
    Back button: 36 px tall
    Help button: 36 px tall
  31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Cancel button: 68 px tall
    Next button: 56 px tall
    Done button: 56 px tall     (a) Next (b) Back (c) Done (d) Cancel
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 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?
    Save button: 36 px tall
    Send button: 64 px tall
    Done button: 56 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 56 px tall
    Help button: 48 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Next button: 52 px tall
    Back button: 48 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Start button: 52 px tall
    Done button: 64 px tall
    Save button: 48 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Send button: 64 px tall
    Help button: 48 px tall     (a) Cancel (b) Help (c) Send

Answer key

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

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