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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 365 · 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: 60 px tall
    Next button: 64 px tall
    Start button: 40 px tall
  2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  3. 3.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 44 px tall
    Back button: 32 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.True or false: grey text on grey is good button design. (a) True (b) False
  9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Help button: 56 px tall
    Send button: 28 px tall
    Save button: 56 px tall     (a) Back (b) Save (c) Send (d) Help
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  12. 12.True or false: space between buttons is poor button design. (a) False (b) True
  13. 13.True or false: space between buttons is good button design. (a) False (b) True
  14. 14.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  15. 15.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) dark blue on black (d) red on green
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 72 px tall
    Help button: 60 px tall
    Next button: 44 px tall     (a) Next (b) Cancel (c) Help (d) Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Done button: 36 px tall
    Help button: 36 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Save button: 40 px tall
    Send button: 56 px tall
    Next button: 72 px tall     (a) Next (b) Send (c) Start (d) Save
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  20. 20.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Start button: 56 px tall
    Done button: 68 px tall
    Send button: 32 px tall     (a) Help (b) Done (c) Send (d) Start
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Cancel button: 56 px tall
    Start button: 48 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Cancel button: 64 px tall
    Next button: 52 px tall
    Done button: 52 px tall
  26. 26.Which colour pair is easy to read? (a) black on pale grey (b) red on green (c) light grey on white (d) pale pink on white
  27. 27.True or false: icons with no meaning is poor button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 48 px tall
    Done button: 40 px tall
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 56 px tall
    Back button: 48 px tall
    Save button: 32 px tall
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  31. 31.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Next button: 36 px tall
    Start button: 60 px tall
  33. 33.Which colour pair is hard to read? (a) white on black (b) pale pink on white (c) dark blue on white (d) white on dark green
  34. 34.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.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
  36. 36.True or false: a big, easy tap area is poor button design. (a) True (b) False
  37. 37.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) pale pink on white
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 40 px tall
    Help button: 60 px tall     (a) Help (b) Save (c) Cancel
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Next button: 40 px tall
    Back button: 60 px tall
    Send button: 72 px tall     (a) Send (b) Next (c) Cancel (d) Back

Answer key

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

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