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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 190 · 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.

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

Answer key

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

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