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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 263 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Send button: 60 px tall
    Save button: 36 px tall
    Back button: 44 px tall
  2. 2.🌗 Is yellow 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: buttons almost touching? (a) poor design (b) good design
  4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  6. 6.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) black on yellow
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Cancel button: 40 px tall
    Back button: 64 px tall
    Next button: 64 px tall
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Help button: 72 px tall
    Start button: 64 px tall     (a) Help (b) Start (c) Cancel
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Help button: 40 px tall
    Save button: 60 px tall
    Cancel button: 44 px tall
  10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  13. 13.True or false: a clear word like Save is good button design. (a) False (b) True
  14. 14.True or false: icons with no meaning is good button design. (a) False (b) True
  15. 15.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Cancel button: 44 px tall
    Save button: 48 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Send button: 60 px tall
    Back button: 36 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Cancel button: 40 px tall
    Done button: 48 px tall
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Help button: 36 px tall
    Back button: 64 px tall     (a) Help (b) Back (c) Save
  20. 20.Which colour pair is hard to read? (a) white on black (b) red on green (c) black on yellow (d) dark blue on white
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Next button: 48 px tall
    Done button: 72 px tall
    Cancel button: 60 px tall     (a) Done (b) Cancel (c) Back (d) Next
  22. 22.True or false: strong colour contrast is good button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Save button: 72 px tall
    Help button: 40 px tall     (a) Back (b) Save (c) Help
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 32 px tall
    Help button: 52 px tall
    Start button: 56 px tall
  25. 25.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) red on green (d) dark blue on black
  26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  27. 27.True or false: grey text on grey is good button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Help button: 36 px tall
    Next button: 56 px tall
  29. 29.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  31. 31.Which colour pair is easy to read? (a) white on black (b) pale pink on white (c) yellow on white (d) light grey on white
  32. 32.True or false: a big, easy tap area is good button design. (a) False (b) True
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Next button: 64 px tall
    Start button: 56 px tall     (a) Start (b) Back (c) Next
  34. 34.True or false: a tiny 20 px button is good button design. (a) True (b) False
  35. 35.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) white on dark green (d) light grey on white
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Cancel button: 56 px tall
    Send button: 64 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 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?
    Send button: 32 px tall
    Save button: 56 px tall
    Done button: 48 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Next button: 64 px tall
    Done button: 72 px tall     (a) Cancel (b) Next (c) Done
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Start button: 72 px tall
    Done button: 64 px tall
    Send button: 64 px tall     (a) Done (b) Start (c) Cancel (d) Send

Answer key

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

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