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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 579 · 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.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Start button: 60 px tall
    Help button: 24 px tall
    Done button: 56 px tall     (a) Next (b) Help (c) Done (d) Start
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Save button: 52 px tall
    Send button: 24 px tall
    Back button: 56 px tall     (a) Help (b) Save (c) Back (d) Send
  4. 4.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🌗 Is yellow on white 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.Which colour pair is easy to read? (a) dark blue on black (b) white on black (c) pale pink on white (d) red on green
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Next button: 64 px tall
    Save button: 56 px tall
    Help button: 36 px tall
  9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 48 px tall
    Help button: 48 px tall
    Next button: 60 px tall     (a) Next (b) Save (c) Help (d) Cancel
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Done button: 64 px tall
    Send button: 40 px tall
  13. 13.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) dark blue on black (d) light grey on white
  14. 14.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) red on green (d) white on dark green
  15. 15.🌗 Is pale pink on white 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. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 52 px tall
    Help button: 36 px tall
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Done button: 32 px tall
    Next button: 60 px tall
    Cancel button: 48 px tall     (a) Help (b) Next (c) Cancel (d) Done
  18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Cancel button: 60 px tall
    Start button: 52 px tall
    Help button: 32 px tall
  23. 23.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Done button: 44 px tall
    Back button: 32 px tall
    Send button: 48 px tall
  25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Send button: 64 px tall
    Help button: 32 px tall
    Next button: 48 px tall     (a) Cancel (b) Send (c) Next (d) Help
  26. 26.True or false: space between buttons is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 44 px tall
    Back button: 36 px tall
    Start button: 52 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Start button: 56 px tall
    Send button: 32 px tall
    Next button: 44 px tall
  29. 29.True or false: grey text on grey is poor button design. (a) False (b) True
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Back button: 52 px tall
    Save button: 40 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Cancel button: 48 px tall
    Save button: 52 px tall
  32. 32.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) black on pale grey (d) white on black
  33. 33.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
  35. 35.True or false: a big, easy tap area is poor button design. (a) True (b) False
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Save button: 32 px tall
    Send button: 56 px tall
    Help button: 56 px tall     (a) Help (b) Cancel (c) Save (d) Send
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Send button: 40 px tall
    Start button: 60 px tall     (a) Send (b) Next (c) Start
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Next button: 32 px tall
    Back button: 60 px tall
    Help button: 48 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Back button: 44 px tall
    Cancel button: 64 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 48 px tall
    Save button: 28 px tall     (a) Save (b) Help (c) Cancel

Answer key

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

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