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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 679 · 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 Cancel button is 44 px tall. How many px taller must it be?
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Next button: 36 px tall
    Back button: 36 px tall
  3. 3.True or false: grey text on grey is poor button design. (a) False (b) True
  4. 4.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) dark blue on white (d) white on dark green
  5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Back button: 44 px tall
    Start button: 52 px tall
    Next button: 64 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Help button: 56 px tall
    Done button: 60 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Start button: 52 px tall
    Next button: 24 px tall
    Cancel button: 72 px tall     (a) Start (b) Next (c) Cancel (d) Back
  10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 52 px tall
    Cancel button: 36 px tall
  12. 12.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 72 px tall
    Next button: 32 px tall     (a) Next (b) Save (c) Cancel
  15. 15.Which colour pair is hard to read? (a) dark blue on black (b) white on dark green (c) black on yellow (d) white on black
  16. 16.True or false: strong colour contrast is good button design. (a) True (b) False
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  19. 19.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) black on yellow (d) dark blue on white
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Save button: 60 px tall
    Back button: 64 px tall
    Help button: 72 px tall     (a) Save (b) Help (c) Back (d) Next
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Back button: 60 px tall
    Help button: 56 px tall
  22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Cancel button: 24 px tall
    Done button: 68 px tall     (a) Cancel (b) Start (c) Done
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Cancel button: 64 px tall
    Back button: 28 px tall
    Done button: 52 px tall     (a) Cancel (b) Done (c) Send (d) Back
  25. 25.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on dark green (d) black on yellow
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Send button: 36 px tall
    Help button: 44 px tall
  27. 27.True or false: a big, easy tap area is poor button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 24 px tall
    Back button: 72 px tall     (a) Cancel (b) Back (c) Start
  29. 29.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 52 px tall
    Done button: 36 px tall     (a) Cancel (b) Done (c) Next
  31. 31.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  32. 32.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.🌗 Is light grey 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?
    Send button: 64 px tall
    Start button: 44 px tall
    Done button: 72 px tall     (a) Done (b) Send (c) Start
  35. 35.🌗 Is black on pale grey 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. Which button is too small?
    Next button: 48 px tall
    Save button: 60 px tall
    Back button: 24 px tall
    Send button: 68 px tall     (a) Save (b) Back (c) Send (d) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Send button: 28 px tall
    Cancel button: 72 px tall     (a) Cancel (b) Send (c) Done
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Cancel button: 60 px tall
    Help button: 44 px tall     (a) Start (b) Help (c) Cancel
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?

Answer key

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

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