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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 294 · 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?
    Done button: 64 px tall
    Back button: 60 px tall
    Help button: 72 px tall
    Save button: 24 px tall     (a) Done (b) Back (c) Save (d) Help
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 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: 60 px tall
    Cancel button: 48 px tall
    Done button: 52 px tall
    Back button: 48 px tall
  4. 4.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Back button: 52 px tall
    Save button: 72 px tall
    Start button: 60 px tall     (a) Save (b) Back (c) Start (d) Next
  6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  7. 7.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) yellow on white (d) white on dark green
  8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  9. 9.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Save button: 52 px tall
    Help button: 48 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Start button: 32 px tall
    Save button: 56 px tall
    Cancel button: 48 px tall
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Save button: 60 px tall
    Cancel button: 64 px tall     (a) Save (b) Cancel (c) Send
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Start button: 48 px tall
    Help button: 48 px tall
    Cancel button: 40 px tall     (a) Send (b) Start (c) Help (d) Cancel
  15. 15.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) light grey on white (d) white on dark green
  16. 16.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  17. 17.Which colour pair is hard to read? (a) pale pink on white (b) dark blue on white (c) white on dark green (d) black on pale grey
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Next button: 44 px tall
    Save button: 68 px tall     (a) Cancel (b) Save (c) Next
  19. 19.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) black on yellow (d) yellow on white
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Back button: 48 px tall
    Cancel button: 44 px tall
    Help button: 44 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Cancel button: 56 px tall
    Save button: 64 px tall     (a) Next (b) Cancel (c) Save
  23. 23.True or false: grey text on grey is poor button design. (a) False (b) True
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Help button: 68 px tall
    Save button: 48 px tall     (a) Help (b) Save (c) Next
  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.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on yellow (d) light grey on white
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Send button: 64 px tall
    Back button: 52 px tall
  30. 30.True or false: strong colour contrast is good button design. (a) True (b) False
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Save button: 24 px tall
    Cancel button: 48 px tall
    Start button: 48 px tall     (a) Next (b) Cancel (c) Start (d) Save
  32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Cancel button: 36 px tall
    Back button: 40 px tall
  34. 34.True or false: a clear word like Save is good button design. (a) True (b) False
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  36. 36.True or false: a tiny 20 px button is good button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Done button: 44 px tall
    Save button: 52 px tall
    Help button: 44 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Save button: 56 px tall
    Send button: 52 px tall
    Back button: 24 px tall     (a) Start (b) Send (c) Save (d) Back
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Done button: 68 px tall
    Next button: 32 px tall
    Start button: 48 px tall     (a) Cancel (b) Next (c) Done (d) Start
  40. 40.🔘 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
    Next button: 32 px tall

Answer key

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

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