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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 548 · 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: 52 px tall
    Cancel button: 60 px tall
    Back button: 40 px tall
    Send button: 60 px tall
  2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  3. 3.True or false: buttons almost touching is good button design. (a) True (b) False
  4. 4.True or false: grey text on grey is poor button design. (a) False (b) True
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Done button: 48 px tall
    Start button: 28 px tall
    Back button: 72 px tall     (a) Back (b) Done (c) Start (d) Send
  6. 6.True or false: icons with no meaning is good button design. (a) False (b) True
  7. 7.True or false: a clear word like Save is good button design. (a) False (b) True
  8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Help button: 32 px tall
    Done button: 64 px tall
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 56 px tall
    Start button: 52 px tall
    Save button: 64 px tall
  12. 12.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Send button: 24 px tall
    Help button: 60 px tall
    Next button: 72 px tall     (a) Start (b) Help (c) Send (d) Next
  14. 14.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Back button: 56 px tall
    Send button: 60 px tall     (a) Send (b) Start (c) Back
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 44 px tall
    Save button: 60 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Save (c) Back (d) Done
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Save button: 60 px tall
    Send button: 36 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 64 px tall
    Done button: 68 px tall     (a) Cancel (b) Save (c) Done
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Help button: 56 px tall
    Cancel button: 60 px tall
  20. 20.True or false: a big, easy tap area is good button design. (a) False (b) True
  21. 21.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 48 px tall
    Start button: 52 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Back button: 32 px tall
    Send button: 36 px tall
    Next button: 44 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 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?
    Cancel button: 24 px tall
    Help button: 68 px tall
    Start button: 56 px tall     (a) Start (b) Cancel (c) Help
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  28. 28.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) dark blue on black (d) light grey on white
  29. 29.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) white on dark green (d) dark blue on white
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  31. 31.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  33. 33.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Start button: 44 px tall
    Done button: 60 px tall     (a) Start (b) Done (c) Save
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 68 px tall
    Next button: 28 px tall
    Save button: 48 px tall     (a) Send (b) Save (c) Back (d) Next
  36. 36.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  37. 37.True or false: a tiny 20 px button is good button design. (a) True (b) False
  38. 38.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) dark blue on white (d) dark blue on black
  39. 39.Which colour pair is easy to read? (a) yellow on white (b) white on black (c) dark blue on black (d) pale pink on white
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Save button: 68 px tall
    Start button: 56 px tall     (a) Start (b) Send (c) Save

Answer key

  1. 3
  2. good design
  3. False
  4. True
  5. Start
  6. False
  7. True
  8. poor design
  9. 1
  10. 20
  11. 3
  12. easy to read
  13. Send
  14. hard to read
  15. Start
  16. Back
  17. 2
  18. Save
  19. 3
  20. True
  21. poor design
  22. 2
  23. 16
  24. 0
  25. 24
  26. Cancel
  27. 12
  28. black on yellow
  29. dark blue on black
  30. 4
  31. easy to read
  32. good design
  33. hard to read
  34. Start
  35. Next
  36. True
  37. False
  38. dark blue on white
  39. white on black
  40. Send

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