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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 281 · 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 pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Next button: 44 px tall
    Done button: 36 px tall
    Back button: 32 px tall
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Cancel button: 60 px tall
    Next button: 48 px tall
    Done button: 68 px tall     (a) Done (b) Next (c) Cancel (d) Send
  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?
    Next button: 40 px tall
    Done button: 72 px tall
    Help button: 60 px tall     (a) Done (b) Help (c) Next
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Send button: 52 px tall
    Save button: 32 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Cancel button: 56 px tall
    Save button: 68 px tall
    Start button: 56 px tall     (a) Save (b) Cancel (c) Done (d) Start
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
  9. 9.True or false: icons with no meaning is poor button design. (a) True (b) False
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
  11. 11.True or false: a tiny 20 px button is good button design. (a) True (b) False
  12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Save button: 32 px tall
    Next button: 72 px tall     (a) Next (b) Back (c) Save
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Cancel button: 60 px tall
    Help button: 64 px tall     (a) Send (b) Help (c) Cancel
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 72 px tall
    Back button: 72 px tall
    Save button: 24 px tall     (a) Send (b) Back (c) Start (d) Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 44 px tall
    Start button: 56 px tall
    Save button: 56 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Cancel button: 40 px tall
    Send button: 48 px tall
    Save button: 60 px tall
  19. 19.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Help button: 48 px tall
    Next button: 52 px tall
    Cancel button: 32 px tall
  21. 21.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Back button: 52 px tall
    Next button: 44 px tall
  23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 52 px tall
    Start button: 48 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 36 px tall
    Done button: 64 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  27. 27.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  31. 31.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) red on green (d) white on black
  32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) light grey on white
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
  35. 35.True or false: a big, easy tap area is good button design. (a) True (b) False
  36. 36.True or false: grey text on grey is good button design. (a) True (b) False
  37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Save button: 32 px tall
    Done button: 56 px tall
    Start button: 64 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Help button: 52 px tall
    Next button: 32 px tall
    Cancel button: 60 px tall

Answer key

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

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