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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 390 · 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.

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

Answer key

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

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