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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 486 · 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 tiny 20 px button is good button design. (a) True (b) False
  2. 2.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  3. 3.True or false: buttons almost touching is good button design. (a) False (b) True
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Save button: 44 px tall
    Help button: 60 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Help button: 48 px tall
    Save button: 48 px tall
    Next button: 52 px tall     (a) Next (b) Help (c) Save (d) Back
  7. 7.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) white on dark green (d) light grey on white
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Help button: 60 px tall
    Next button: 52 px tall     (a) Next (b) Help (c) Start
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) black on pale grey (d) dark blue on white
  13. 13.True or false: a big, easy tap area is poor button design. (a) False (b) True
  14. 14.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) red on green (d) black on yellow
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 52 px tall
    Save button: 64 px tall
    Done button: 60 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Done button: 28 px tall
    Help button: 68 px tall
    Next button: 60 px tall     (a) Send (b) Next (c) Help (d) Done
  17. 17.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  18. 18.True or false: grey text on grey is good button design. (a) True (b) False
  19. 19.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) dark blue on black (d) white on dark green
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 52 px tall
    Help button: 64 px tall
  21. 21.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  26. 26.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) yellow on white (d) pale pink on white
  27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.True or false: space between buttons is good button design. (a) False (b) True
  30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Save button: 48 px tall
    Help button: 60 px tall
    Done button: 56 px tall     (a) Send (b) Help (c) Done (d) Save
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Back button: 24 px tall
    Help button: 60 px tall
    Save button: 64 px tall     (a) Help (b) Start (c) Save (d) Back
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Done button: 52 px tall
    Save button: 40 px tall
    Next button: 68 px tall     (a) Done (b) Help (c) Next (d) Save
  34. 34.True or false: icons with no meaning is poor button design. (a) True (b) False
  35. 35.True or false: a big, easy tap area is good button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Save button: 72 px tall
    Cancel button: 64 px tall
    Help button: 64 px tall     (a) Save (b) Help (c) Send (d) Cancel
  37. 37.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  38. 38.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?

Answer key

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

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