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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 254 · 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.

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

Answer key

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

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