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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 384 · 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: a clear word like Save is poor button design. (a) True (b) False
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Done button: 64 px tall
    Save button: 28 px tall     (a) Done (b) Save (c) Start
  3. 3.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on dark green (d) dark blue on white
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 64 px tall
    Help button: 40 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Back button: 48 px tall
    Save button: 52 px tall     (a) Back (b) Save (c) Start
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Save button: 28 px tall
    Done button: 48 px tall     (a) Done (b) Start (c) Save
  7. 7.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Cancel button: 52 px tall
    Send button: 56 px tall
    Save button: 32 px tall     (a) Send (b) Next (c) Save (d) Cancel
  9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Done button: 40 px tall
    Start button: 40 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  13. 13.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) light grey on white
  14. 14.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) dark blue on black
  15. 15.True or false: icons with no meaning is good button design. (a) True (b) False
  16. 16.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on white (d) yellow on white
  17. 17.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) pale pink on white
  18. 18.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  20. 20.True or false: buttons almost touching is good button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  22. 22.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  23. 23.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  24. 24.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Help button: 32 px tall
    Next button: 48 px tall     (a) Done (b) Help (c) Next
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Cancel button: 48 px tall
    Save button: 48 px tall     (a) Cancel (b) Next (c) Save
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Save button: 44 px tall
    Next button: 68 px tall     (a) Next (b) Send (c) Save
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 64 px tall
    Save button: 60 px tall
    Done button: 48 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Done button: 24 px tall
    Cancel button: 48 px tall     (a) Help (b) Done (c) Cancel
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Send button: 28 px tall
    Back button: 56 px tall     (a) Back (b) Send (c) Help
  32. 32.True or false: strong colour contrast is poor button design. (a) True (b) False
  33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Send button: 60 px tall
    Start button: 60 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Cancel button: 48 px tall
    Help button: 64 px tall
    Done button: 56 px tall
  36. 36.True or false: a big, easy tap area is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Help button: 48 px tall
    Back button: 48 px tall     (a) Save (b) Back (c) Help
  38. 38.True or false: strong colour contrast is good button design. (a) True (b) False
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Send button: 44 px tall
    Next button: 52 px tall
    Cancel button: 32 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Cancel button: 64 px tall
    Next button: 32 px tall

Answer key

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

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