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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 377 · 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.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Save button: 32 px tall
    Send button: 40 px tall
    Cancel button: 64 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Send button: 52 px tall
    Start button: 52 px tall
    Cancel button: 72 px tall     (a) Send (b) Start (c) Cancel (d) Done
  4. 4.True or false: strong colour contrast is good button design. (a) True (b) False
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Help button: 56 px tall
    Done button: 28 px tall
    Send button: 52 px tall     (a) Start (b) Help (c) Send (d) Done
  6. 6.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Done button: 60 px tall
    Help button: 40 px tall
    Back button: 64 px tall
  8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  9. 9.True or false: space between buttons is poor button design. (a) False (b) True
  10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 52 px tall
    Next button: 28 px tall     (a) Save (b) Cancel (c) Next
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Help button: 52 px tall
    Back button: 24 px tall
    Next button: 64 px tall     (a) Help (b) Back (c) Cancel (d) Next
  14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  15. 15.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) black on pale grey (d) pale pink on white
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 64 px tall
    Next button: 48 px tall
  17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Save button: 60 px tall
    Send button: 64 px tall
  19. 19.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) yellow on white (d) white on black
  20. 20.True or false: buttons almost touching is good button design. (a) True (b) False
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 68 px tall
    Cancel button: 56 px tall     (a) Help (b) Done (c) Cancel
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Back button: 36 px tall
    Done button: 48 px tall
    Cancel button: 68 px tall     (a) Back (b) Done (c) Cancel (d) Help
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  25. 25.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
  27. 27.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 68 px tall
    Start button: 40 px tall     (a) Cancel (b) Start (c) Save
  29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.True or false: a clear word like Save is poor button design. (a) True (b) False
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 60 px tall
    Start button: 48 px tall
  32. 32.True or false: a clear word like Save is good button design. (a) False (b) True
  33. 33.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) dark blue on black (d) light grey on white
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Start button: 40 px tall
    Next button: 64 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Back button: 68 px tall
    Start button: 64 px tall     (a) Start (b) Back (c) Send
  36. 36.True or false: buttons almost touching is poor button design. (a) False (b) True
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Help button: 44 px tall
    Cancel button: 56 px tall
    Start button: 48 px tall
  38. 38.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) white on dark green (d) red on green
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Start button: 40 px tall
    Back button: 32 px tall
    Done button: 60 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?

Answer key

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

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