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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 475 · 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 black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.True or false: a big, easy tap area is poor button design. (a) True (b) False
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Cancel button: 40 px tall
    Back button: 40 px tall
  5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  7. 7.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 40 px tall
    Send button: 64 px tall     (a) Send (b) Cancel (c) Save
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Cancel button: 52 px tall
    Next button: 60 px tall
    Send button: 60 px tall     (a) Cancel (b) Next (c) Save (d) Send
  10. 10.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on yellow (d) black on pale grey
  11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.True or false: buttons almost touching is good button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Help button: 48 px tall
    Save button: 56 px tall
  14. 14.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on pale grey (d) dark blue on white
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 60 px tall
    Save button: 60 px tall
    Send button: 56 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Send button: 24 px tall
    Back button: 52 px tall     (a) Save (b) Send (c) Back
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Next button: 52 px tall
    Start button: 44 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Next button: 56 px tall
    Send button: 32 px tall
    Help button: 60 px tall     (a) Next (b) Send (c) Help (d) Start
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Done button: 52 px tall
    Help button: 60 px tall
    Save button: 72 px tall     (a) Done (b) Save (c) Send (d) Help
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Start button: 48 px tall
    Cancel button: 52 px tall
    Send button: 68 px tall     (a) Start (b) Cancel (c) Send (d) Next
  21. 21.True or false: a big, easy tap area is good button design. (a) True (b) False
  22. 22.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) light grey on white
  23. 23.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Help button: 36 px tall
    Send button: 36 px tall
    Back button: 56 px tall
  27. 27.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  29. 29.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 60 px tall
    Back button: 64 px tall
    Send button: 44 px tall
    Next button: 64 px tall     (a) Back (b) Next (c) Done (d) Send
  31. 31.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) dark blue on white
  32. 32.True or false: a clear word like Save is poor button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 64 px tall
    Done button: 60 px tall
    Cancel button: 48 px tall
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  35. 35.True or false: icons with no meaning is poor button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Start button: 48 px tall
    Cancel button: 72 px tall     (a) Cancel (b) Start (c) Back
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Help button: 44 px tall
    Cancel button: 56 px tall
    Next button: 56 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Save button: 44 px tall
    Next button: 64 px tall
  39. 39.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  40. 40.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) yellow on white (d) dark blue on black

Answer key

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

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