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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 649 · 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. The Cancel button is 32 px tall. How many px taller must it be?
  2. 2.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
  4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  5. 5.Which colour pair is hard to read? (a) yellow on white (b) white on black (c) black on pale grey (d) white on dark green
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 40 px tall
    Help button: 64 px tall
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Done button: 48 px tall
    Send button: 28 px tall     (a) Send (b) Done (c) Cancel
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Done button: 48 px tall
    Cancel button: 28 px tall     (a) Cancel (b) Help (c) Done
  9. 9.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) white on dark green
  10. 10.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  11. 11.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  13. 13.True or false: grey text on grey is poor button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Save button: 52 px tall
    Send button: 28 px tall     (a) Send (b) Next (c) Save
  15. 15.🌗 Is dark blue on black 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. Which button is too small?
    Cancel button: 64 px tall
    Help button: 40 px tall
    Save button: 52 px tall     (a) Save (b) Cancel (c) Help
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Send button: 48 px tall
    Cancel button: 64 px tall     (a) Cancel (b) Start (c) Send
  18. 18.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Done button: 32 px tall
    Save button: 52 px tall
    Send button: 44 px tall
  20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Start button: 56 px tall
    Back button: 44 px tall
    Next button: 60 px tall     (a) Next (b) Done (c) Back (d) Start
  21. 21.True or false: grey text on grey is good button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Done button: 28 px tall
    Send button: 64 px tall
    Save button: 72 px tall     (a) Cancel (b) Send (c) Done (d) Save
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Help button: 32 px tall
    Next button: 60 px tall
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Next button: 48 px tall
    Save button: 44 px tall
    Back button: 60 px tall     (a) Back (b) Cancel (c) Next (d) Save
  25. 25.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  26. 26.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) white on black
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  28. 28.True or false: space between buttons is poor button design. (a) True (b) False
  29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.Which colour pair is hard to read? (a) red on green (b) black on pale grey (c) black on yellow (d) white on dark green
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Start button: 56 px tall
    Done button: 60 px tall
    Cancel button: 68 px tall     (a) Done (b) Save (c) Cancel (d) Start
  34. 34.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) pale pink on white (d) black on yellow
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Done button: 68 px tall
    Start button: 44 px tall     (a) Done (b) Start (c) Next
  36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Help button: 48 px tall
    Send button: 48 px tall     (a) Done (b) Help (c) Send
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 32 px tall
    Next button: 48 px tall
    Cancel button: 48 px tall
    Back button: 48 px tall     (a) Help (b) Back (c) Cancel (d) Next
  39. 39.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) dark blue on white (d) light grey on white
  40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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