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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 388 · 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 pale grey 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. The Next button is 28 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 60 px tall
    Back button: 44 px tall
  4. 4.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) pale pink on white (d) dark blue on white
  6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  7. 7.True or false: a clear word like Save is poor button design. (a) False (b) True
  8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 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?
    Help button: 44 px tall
    Save button: 36 px tall
    Start button: 48 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 52 px tall
    Done button: 60 px tall
    Send button: 60 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Next button: 56 px tall
    Cancel button: 64 px tall
    Done button: 44 px tall
  13. 13.True or false: strong colour contrast is good button design. (a) False (b) True
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Send button: 60 px tall
    Help button: 44 px tall
    Next button: 68 px tall     (a) Next (b) Help (c) Send (d) Start
  15. 15.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
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Start button: 56 px tall
    Cancel button: 60 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Help button: 60 px tall
    Next button: 40 px tall
    Start button: 48 px tall     (a) Help (b) Next (c) Start (d) Done
  18. 18.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) pale pink on white
  19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Save button: 68 px tall
    Done button: 52 px tall
    Back button: 56 px tall     (a) Save (b) Next (c) Done (d) Back
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Back button: 32 px tall
    Save button: 44 px tall
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Start button: 64 px tall
    Back button: 44 px tall
  24. 24.True or false: a tiny 20 px button is good button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Help button: 56 px tall
    Cancel button: 60 px tall     (a) Cancel (b) Save (c) Help
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Done button: 32 px tall
    Save button: 40 px tall
  27. 27.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Start button: 56 px tall
    Next button: 36 px tall
    Done button: 48 px tall     (a) Done (b) Cancel (c) Start (d) Next
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Send button: 56 px tall
    Back button: 52 px tall
  30. 30.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) red on green (d) black on pale grey
  31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Back button: 60 px tall
    Send button: 44 px tall     (a) Cancel (b) Back (c) Send
  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. How many of these buttons follow the rule?
    Send button: 36 px tall
    Next button: 36 px tall
    Save button: 44 px tall
    Help button: 32 px tall
  34. 34.Which colour pair is easy to read? (a) dark blue on black (b) black on pale grey (c) yellow on white (d) red on green
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Next button: 52 px tall
    Done button: 64 px tall
    Save button: 64 px tall
  36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Save button: 32 px tall
    Back button: 48 px tall
    Help button: 40 px tall
  38. 38.True or false: a clear word like Save is good button design. (a) True (b) False
  39. 39.True or false: icons with no meaning is poor button design. (a) True (b) False
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 36 px tall
    Cancel button: 52 px tall     (a) Send (b) Start (c) Cancel

Answer key

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

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