← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 570 · 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 yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  4. 4.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  5. 5.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  6. 6.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.True or false: space between buttons is good button design. (a) False (b) True
  8. 8.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  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: a big, easy tap area? (a) poor design (b) good design
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 36 px tall
    Back button: 32 px tall
  12. 12.True or false: space between buttons is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  14. 14.True or false: a big, easy tap area is poor button design. (a) True (b) False
  15. 15.True or false: a clear word like Save is good button design. (a) True (b) False
  16. 16.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Done button: 44 px tall
    Help button: 44 px tall
  18. 18.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Next button: 64 px tall
    Cancel button: 68 px tall     (a) Cancel (b) Help (c) Next
  20. 20.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) pale pink on white (d) white on dark green
  21. 21.True or false: strong colour contrast is good button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Cancel button: 44 px tall
    Send button: 68 px tall     (a) Send (b) Cancel (c) Back
  23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  24. 24.True or false: icons with no meaning is poor button design. (a) False (b) True
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 32 px tall
    Cancel button: 40 px tall
    Save button: 52 px tall
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 52 px tall
    Cancel button: 32 px tall
    Next button: 52 px tall     (a) Send (b) Next (c) Cancel (d) Start
  27. 27.True or false: icons with no meaning is good button design. (a) True (b) False
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Help button: 28 px tall
    Cancel button: 72 px tall     (a) Save (b) Help (c) Cancel
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Save button: 64 px tall
    Start button: 64 px tall     (a) Next (b) Start (c) Save
  31. 31.True or false: a big, easy tap area is good button design. (a) False (b) True
  32. 32.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  33. 33.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) white on black (d) black on pale grey
  34. 34.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) light grey on white (d) black on pale grey
  35. 35.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Next button: 64 px tall
    Save button: 36 px tall
    Help button: 52 px tall
  37. 37.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  38. 38.Which colour pair is easy to read? (a) white on black (b) red on green (c) light grey on white (d) yellow on white
  39. 39.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on white (d) yellow on white
  40. 40.True or false: a tiny 20 px button is good button design. (a) True (b) False

Answer key

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

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