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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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