← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 92 · 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 yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.True or false: space between buttons is poor button design. (a) False (b) True
  3. 3.Which colour pair is hard to read? (a) yellow on white (b) black on pale grey (c) black on yellow (d) white on dark green
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  5. 5.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  7. 7.True or false: a big, easy tap area is poor button design. (a) False (b) True
  8. 8.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  9. 9.True or false: buttons almost touching is poor button design. (a) True (b) False
  10. 10.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) white on dark green (d) yellow on white
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
  13. 13.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.True or false: a clear word like Save is poor button design. (a) False (b) True
  15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Done button: 72 px tall
    Cancel button: 52 px tall
    Help button: 24 px tall     (a) Cancel (b) Done (c) Help (d) Next
  17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  18. 18.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) light grey on white (d) pale pink on white
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Next button: 36 px tall
    Save button: 44 px tall
    Back button: 32 px tall
  20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  21. 21.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  22. 22.True or false: buttons almost touching is good button design. (a) False (b) True
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Send button: 40 px tall
    Start button: 32 px tall
  24. 24.True or false: a tiny 20 px button is good button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
  26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
  27. 27.Which colour pair is hard to read? (a) black on yellow (b) light grey on white (c) dark blue on white (d) white on dark green
  28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  29. 29.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  30. 30.True or false: strong colour contrast is good button design. (a) False (b) True
  31. 31.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) white on black (d) yellow on white
  32. 32.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) red on green (d) black on yellow
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Help button: 60 px tall
    Next button: 52 px tall
    Back button: 32 px tall     (a) Next (b) Help (c) Back (d) Save
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Back button: 64 px tall
    Send button: 40 px tall
    Next button: 36 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Start button: 52 px tall
    Back button: 36 px tall
    Cancel button: 52 px tall
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Help button: 56 px tall
    Done button: 36 px tall     (a) Help (b) Done (c) Next
  38. 38.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
  39. 39.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) red on green (d) dark blue on white
  40. 40.True or false: icons with no meaning is good button design. (a) True (b) False

Answer key

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

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