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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 211 · 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 Done button is 32 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?
    Next button: 56 px tall
    Done button: 52 px tall
    Start button: 40 px tall
    Back button: 60 px tall     (a) Start (b) Back (c) Done (d) Next
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Help button: 64 px tall
    Cancel button: 48 px tall
    Save button: 68 px tall     (a) Save (b) Back (c) Help (d) Cancel
  4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.True or false: grey text on grey is good button design. (a) False (b) True
  6. 6.True or false: icons with no meaning is good button design. (a) True (b) False
  7. 7.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) black on pale grey
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
  9. 9.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) dark blue on white (d) white on dark green
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 56 px tall
    Save button: 68 px tall
    Next button: 24 px tall     (a) Send (b) Help (c) Save (d) Next
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) pale pink on white (d) red on green
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Cancel button: 36 px tall
    Start button: 40 px tall
  14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 36 px tall
    Save button: 64 px tall
    Start button: 72 px tall     (a) Save (b) Send (c) Done (d) Start
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Done button: 32 px tall
    Help button: 56 px tall     (a) Help (b) Done (c) Start
  17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 36 px tall
    Back button: 60 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 56 px tall
    Start button: 40 px tall
    Back button: 60 px tall     (a) Start (b) Back (c) Cancel (d) Send
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  21. 21.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  23. 23.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) light grey on white (d) black on yellow
  24. 24.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Start button: 36 px tall
    Back button: 60 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Back button: 64 px tall
    Done button: 28 px tall
    Help button: 48 px tall     (a) Help (b) Send (c) Done (d) Back
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  30. 30.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on black (d) red on green
  31. 31.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on white (d) dark blue on black
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Cancel button: 56 px tall
    Start button: 68 px tall     (a) Help (b) Cancel (c) Start
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 68 px tall
    Cancel button: 24 px tall
    Send button: 68 px tall     (a) Done (b) Send (c) Save (d) Cancel
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  36. 36.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Start button: 48 px tall
    Done button: 44 px tall
    Save button: 48 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 52 px tall
    Cancel button: 44 px tall
    Done button: 60 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Help button: 56 px tall
    Start button: 44 px tall     (a) Help (b) Save (c) Start
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Done button: 56 px tall
    Next button: 52 px tall
    Start button: 72 px tall     (a) Start (b) Send (c) Next (d) Done

Answer key

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

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