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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 468 · 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?
    Cancel button: 36 px tall
    Save button: 64 px tall
    Help button: 40 px tall
    Next button: 36 px tall
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  4. 4.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) black on pale grey (d) pale pink on white
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Help button: 56 px tall
    Cancel button: 28 px tall     (a) Help (b) Cancel (c) Start
  6. 6.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.True or false: buttons almost touching is poor button design. (a) True (b) False
  8. 8.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Help button: 60 px tall
    Next button: 40 px tall     (a) Next (b) Done (c) Help
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  11. 11.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) red on green (d) black on pale grey
  12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on dark green (d) yellow on white
  14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Start button: 32 px tall
    Back button: 60 px tall     (a) Back (b) Start (c) Send
  16. 16.True or false: grey text on grey is poor button design. (a) False (b) True
  17. 17.True or false: a big, easy tap area is poor button design. (a) False (b) True
  18. 18.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.True or false: a big, easy tap area is good button design. (a) False (b) True
  20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Next button: 40 px tall
    Cancel button: 48 px tall
    Send button: 60 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Next button: 60 px tall
    Send button: 48 px tall     (a) Next (b) Send (c) Save
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  25. 25.True or false: space between buttons is poor button design. (a) False (b) True
  26. 26.Which colour pair is hard to read? (a) black on pale grey (b) white on black (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?
    Cancel button: 56 px tall
    Start button: 60 px tall
    Send button: 36 px tall
  28. 28.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  32. 32.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 32 px tall
    Start button: 52 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Help button: 56 px tall
    Cancel button: 68 px tall
    Next button: 72 px tall     (a) Save (b) Cancel (c) Next (d) Help
  35. 35.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.True or false: a clear word like Save is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Cancel button: 60 px tall
    Send button: 52 px tall
    Save button: 32 px tall
  38. 38.True or false: a clear word like Save is poor 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?
    Send button: 32 px tall
    Help button: 44 px tall
    Done button: 60 px tall
    Save button: 64 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Send button: 48 px tall
    Cancel button: 44 px tall
    Help button: 56 px tall     (a) Help (b) Send (c) Back (d) Cancel

Answer key

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

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