← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 291 · 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 this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Back button: 48 px tall
    Help button: 32 px tall     (a) Cancel (b) Help (c) Back
  3. 3.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 36 px tall
    Back button: 36 px tall
    Cancel button: 44 px tall
  5. 5.True or false: space between buttons is poor button design. (a) True (b) False
  6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  7. 7.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Help button: 60 px tall
    Back button: 44 px tall
    Next button: 44 px tall
  9. 9.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) white on dark green (d) yellow on white
  10. 10.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) red on green (d) white on black
  11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Done button: 52 px tall
    Back button: 40 px tall
    Start button: 52 px tall     (a) Save (b) Done (c) Start (d) Back
  14. 14.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  15. 15.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) light grey on white (d) white on black
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Next button: 36 px tall
    Done button: 64 px tall     (a) Save (b) Done (c) Next
  17. 17.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) light grey on white (d) red on green
  18. 18.🌗 Is yellow on white 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?
    Save button: 72 px tall
    Next button: 68 px tall
    Start button: 40 px tall
    Done button: 48 px tall     (a) Save (b) Next (c) Start (d) Done
  20. 20.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
  21. 21.🌗 Is black on yellow 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?
    Done button: 52 px tall
    Back button: 56 px tall
    Cancel button: 32 px tall
    Save button: 48 px tall
  23. 23.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  24. 24.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.True or false: grey text on grey is poor button design. (a) True (b) False
  27. 27.True or false: a clear word like Save is good button design. (a) False (b) True
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 36 px tall
    Back button: 60 px tall
    Done button: 64 px tall
  29. 29.True or false: a big, easy tap area is poor button design. (a) True (b) False
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Next button: 44 px tall
    Save button: 40 px tall
    Cancel button: 64 px tall
  32. 32.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
  35. 35.True or false: buttons almost touching is poor button design. (a) False (b) True
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 40 px tall
    Back button: 64 px tall
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 32 px tall
    Done button: 36 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 44 px tall
    Done button: 64 px tall
  39. 39.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) yellow on white (d) black on yellow
  40. 40.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?

Answer key

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

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