← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

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

Answer key

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

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students