← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 437 · 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.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) red on green (d) black on pale grey
  2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Send button: 48 px tall
    Cancel button: 56 px tall
    Back button: 56 px tall
  3. 3.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Send button: 48 px tall
    Save button: 64 px tall
    Next button: 68 px tall     (a) Next (b) Save (c) Done (d) Send
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Help button: 52 px tall
    Start button: 56 px tall     (a) Send (b) Help (c) Start
  7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 64 px tall
    Back button: 40 px tall
    Help button: 56 px tall
  9. 9.True or false: grey text on grey is poor button design. (a) True (b) False
  10. 10.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Save button: 40 px tall
    Cancel button: 64 px tall
  12. 12.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) black on yellow (d) yellow on white
  13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 56 px tall
    Back button: 40 px tall
    Send button: 56 px tall
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Save button: 64 px tall
    Help button: 68 px tall     (a) Next (b) Help (c) Save
  15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Help button: 44 px tall
    Send button: 56 px tall
    Cancel button: 36 px tall
  16. 16.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 64 px tall
    Help button: 24 px tall
    Save button: 64 px tall     (a) Cancel (b) Done (c) Save (d) Help
  19. 19.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) dark blue on black
  20. 20.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  21. 21.True or false: a big, easy tap area is poor button design. (a) True (b) False
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Cancel button: 68 px tall
    Back button: 24 px tall
    Next button: 72 px tall     (a) Next (b) Back (c) Cancel (d) Start
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Send button: 40 px tall
    Cancel button: 32 px tall
    Back button: 40 px tall
  24. 24.True or false: a clear word like Save is good button design. (a) False (b) True
  25. 25.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 64 px tall
    Back button: 32 px tall
  27. 27.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  28. 28.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Save button: 36 px tall
    Back button: 52 px tall
    Done button: 64 px tall     (a) Cancel (b) Back (c) Save (d) Done
  30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Help button: 32 px tall
    Next button: 56 px tall
  32. 32.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  33. 33.True or false: a tiny 20 px button is good button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 32 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Help (c) Send
  36. 36.True or false: buttons almost touching is good button design. (a) True (b) False
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
  38. 38.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Cancel button: 44 px tall
    Done button: 36 px tall
  40. 40.True or false: icons with no meaning is good button design. (a) True (b) False

Answer key

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

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