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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 664 · 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. The Back button is 20 px tall. How many px taller must it be?
  2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Next button: 36 px tall
    Send button: 32 px tall
    Start button: 44 px tall
  4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Cancel button: 40 px tall
    Help button: 68 px tall     (a) Cancel (b) Help (c) Start
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 44 px tall
    Send button: 64 px tall
  7. 7.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.True or false: a clear word like Save is poor button design. (a) False (b) True
  12. 12.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) red on green (d) dark blue on black
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Start button: 40 px tall
    Next button: 36 px tall
    Send button: 64 px tall
  14. 14.🌗 Is dark blue on white 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. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Help button: 60 px tall
    Next button: 32 px tall
    Save button: 56 px tall
  16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 36 px tall
    Done button: 52 px tall
  18. 18.True or false: grey text on grey is good button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 28 px tall
    Cancel button: 72 px tall     (a) Cancel (b) Send (c) Back
  20. 20.True or false: icons with no meaning is good button design. (a) False (b) True
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Help button: 44 px tall
    Save button: 72 px tall     (a) Help (b) Done (c) Save
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 48 px tall
    Cancel button: 52 px tall
    Save button: 32 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Help button: 48 px tall
    Cancel button: 48 px tall
    Start button: 60 px tall     (a) Cancel (b) Send (c) Start (d) Help
  25. 25.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) yellow on white (d) dark blue on black
  27. 27.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) pale pink on white (d) dark blue on black
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Next button: 52 px tall
    Help button: 52 px tall     (a) Back (b) Next (c) Help
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Help button: 68 px tall
    Back button: 60 px tall     (a) Back (b) Help (c) Next
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 36 px tall
    Save button: 56 px tall     (a) Save (b) Send (c) Help
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Start button: 52 px tall
    Cancel button: 48 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 72 px tall
    Next button: 48 px tall     (a) Next (b) Cancel (c) Help
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Start button: 40 px tall
    Back button: 64 px tall
  35. 35.True or false: strong colour contrast is good button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 64 px tall
    Cancel button: 40 px tall
    Back button: 56 px tall     (a) Cancel (b) Done (c) Back
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Send button: 48 px tall
    Cancel button: 32 px tall
    Back button: 40 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Send button: 24 px tall
    Next button: 48 px tall
    Save button: 48 px tall     (a) Help (b) Save (c) Next (d) Send
  39. 39.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design

Answer key

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

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