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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 158 · 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 this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Start button: 64 px tall
    Save button: 48 px tall
  3. 3.True or false: a big, easy tap area is poor button design. (a) False (b) True
  4. 4.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) light grey on white (d) white on black
  5. 5.🌗 Is white 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) hard to read (b) easy to read
  7. 7.True or false: icons with no meaning is good button design. (a) False (b) True
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Start button: 36 px tall
    Cancel button: 52 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Send button: 40 px tall
    Start button: 32 px tall
  11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  12. 12.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Start button: 44 px tall
    Save button: 68 px tall
    Next button: 56 px tall     (a) Next (b) Start (c) Save (d) Cancel
  14. 14.True or false: space between buttons is good button design. (a) False (b) True
  15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Help button: 36 px tall
    Save button: 52 px tall
    Next button: 36 px tall
  17. 17.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Cancel button: 40 px tall
    Send button: 52 px tall     (a) Done (b) Cancel (c) Send
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Save button: 64 px tall
    Help button: 56 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Next button: 52 px tall
    Back button: 32 px tall
  21. 21.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Cancel button: 72 px tall
    Save button: 72 px tall     (a) Cancel (b) Save (c) Back
  23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  24. 24.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) yellow on white (d) light grey on white
  25. 25.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) light grey on white (d) dark blue on white
  26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Start button: 36 px tall
    Next button: 64 px tall
    Save button: 64 px tall     (a) Start (b) Save (c) Help (d) Next
  30. 30.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) pale pink on white (d) white on dark green
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  32. 32.Which colour pair is hard to read? (a) white on black (b) pale pink on white (c) white on dark green (d) black on pale grey
  33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 56 px tall
    Done button: 48 px tall
  34. 34.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) red on green (d) white on dark green
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 40 px tall
    Cancel button: 68 px tall     (a) Help (b) Send (c) Cancel
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Next button: 28 px tall
    Back button: 68 px tall
    Cancel button: 52 px tall     (a) Next (b) Cancel (c) Back (d) Save
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Cancel button: 60 px tall
    Next button: 24 px tall
    Save button: 60 px tall     (a) Save (b) Cancel (c) Next (d) Send
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Cancel button: 68 px tall
    Done button: 40 px tall
    Send button: 52 px tall     (a) Send (b) Cancel (c) Done (d) Save
  39. 39.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) dark blue on white (d) yellow on white
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Help button: 72 px tall
    Done button: 56 px tall
    Start button: 64 px tall     (a) Done (b) Back (c) Help (d) Start

Answer key

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

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