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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 208 · 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. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 40 px tall
    Done button: 60 px tall
    Cancel button: 60 px tall
  2. 2.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) black on yellow (d) red on green
  3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) light grey on white (d) white on black
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Help button: 36 px tall
    Back button: 40 px tall
    Send button: 56 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Cancel button: 32 px tall
    Next button: 40 px tall
    Done button: 48 px tall
  7. 7.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Done button: 48 px tall
    Save button: 48 px tall     (a) Start (b) Save (c) Done
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 72 px tall
    Help button: 28 px tall
    Cancel button: 48 px tall     (a) Cancel (b) Send (c) Back (d) Help
  10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Start button: 72 px tall
    Done button: 52 px tall     (a) Start (b) Done (c) Next
  12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
  13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  14. 14.True or false: a big, easy tap area is good button design. (a) False (b) True
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Next button: 60 px tall
    Done button: 64 px tall
    Start button: 52 px tall     (a) Done (b) Help (c) Start (d) Next
  16. 16.True or false: icons with no meaning is poor button design. (a) False (b) True
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  18. 18.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.True or false: space between buttons is good button design. (a) False (b) True
  20. 20.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) pale pink on white (d) dark blue on black
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Start button: 48 px tall
    Next button: 60 px tall     (a) Start (b) Save (c) Next
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  23. 23.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  25. 25.True or false: buttons almost touching is good button design. (a) True (b) False
  26. 26.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on black (d) black on yellow
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 36 px tall
    Help button: 32 px tall
    Back button: 64 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Send button: 36 px tall
    Save button: 48 px tall
    Back button: 48 px tall     (a) Back (b) Save (c) Send (d) Next
  29. 29.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Done button: 28 px tall
    Help button: 72 px tall
    Cancel button: 60 px tall     (a) Help (b) Done (c) Start (d) Cancel
  31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  32. 32.True or false: strong colour contrast is good button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  34. 34.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  35. 35.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Done button: 48 px tall
    Next button: 36 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Done button: 40 px tall
    Next button: 64 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Done button: 44 px tall
    Back button: 64 px tall
    Cancel button: 44 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Send button: 64 px tall
    Save button: 56 px tall
    Done button: 36 px tall

Answer key

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

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