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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 175 · 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: buttons almost touching is good button design. (a) True (b) False
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Help button: 40 px tall
    Back button: 64 px tall
    Cancel button: 48 px tall     (a) Cancel (b) Start (c) Help (d) Back
  3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Save button: 72 px tall
    Help button: 32 px tall     (a) Save (b) Help (c) Done
  5. 5.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) dark blue on black (d) light grey on white
  6. 6.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  7. 7.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) dark blue on white (d) white on dark green
  8. 8.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) dark blue on white
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Start button: 52 px tall
    Done button: 60 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Back button: 44 px tall
    Cancel button: 52 px tall
    Start button: 68 px tall     (a) Start (b) Cancel (c) Back (d) Help
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Cancel button: 60 px tall
    Back button: 40 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Start button: 44 px tall
    Help button: 68 px tall
    Back button: 60 px tall     (a) Send (b) Back (c) Start (d) Help
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Help button: 44 px tall
    Start button: 64 px tall     (a) Start (b) Cancel (c) Help
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Help button: 52 px tall
    Start button: 68 px tall     (a) Start (b) Help (c) Cancel
  15. 15.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) light grey on white (d) black on yellow
  16. 16.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Done button: 32 px tall
    Save button: 32 px tall
    Cancel button: 52 px tall
  18. 18.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 52 px tall
    Help button: 24 px tall     (a) Back (b) Help (c) Cancel
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Done button: 52 px tall
    Cancel button: 72 px tall
    Start button: 64 px tall     (a) Cancel (b) Start (c) Done (d) Next
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  22. 22.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Start button: 48 px tall
    Next button: 48 px tall     (a) Start (b) Next (c) Cancel
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Next button: 48 px tall
    Back button: 24 px tall
    Send button: 72 px tall     (a) Back (b) Next (c) Cancel (d) Send
  25. 25.True or false: grey text on grey is good button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 60 px tall
    Back button: 28 px tall     (a) Done (b) Back (c) Save
  27. 27.True or false: a clear word like Save is good button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Start button: 48 px tall
    Back button: 72 px tall     (a) Start (b) Save (c) Back
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Back button: 36 px tall
    Send button: 48 px tall     (a) Help (b) Back (c) Send
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  31. 31.True or false: grey text on grey is poor button design. (a) False (b) True
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
  33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 40 px tall
    Back button: 68 px tall
    Done button: 56 px tall     (a) Help (b) Back (c) Done (d) Cancel
  36. 36.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) black on yellow (d) pale pink on white
  37. 37.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Done button: 32 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?
    Back button: 56 px tall
    Save button: 40 px tall
    Next button: 60 px tall
    Send button: 56 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Cancel button: 56 px tall
    Save button: 72 px tall
    Send button: 68 px tall     (a) Cancel (b) Send (c) Save (d) Help

Answer key

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

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