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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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