← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 78 · 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.True or false: strong colour contrast is good button design. (a) True (b) False
  2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  3. 3.True or false: grey text on grey is good button design. (a) True (b) False
  4. 4.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) white on dark green (d) white on black
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Start button: 64 px tall
    Back button: 36 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Cancel button: 44 px tall
    Done button: 56 px tall
  7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  8. 8.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
  9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Cancel button: 60 px tall
    Next button: 60 px tall     (a) Cancel (b) Next (c) Send
  10. 10.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Start button: 60 px tall
    Send button: 32 px tall     (a) Start (b) Send (c) Next
  12. 12.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) light grey on white (d) dark blue on black
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 60 px tall
    Next button: 44 px tall
    Cancel button: 72 px tall     (a) Back (b) Send (c) Cancel (d) Next
  14. 14.True or false: a big, easy tap area is poor button design. (a) True (b) False
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Done button: 60 px tall
    Start button: 40 px tall     (a) Next (b) Done (c) Start
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Cancel button: 32 px tall
    Help button: 56 px tall     (a) Help (b) Back (c) Cancel
  17. 17.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Done button: 32 px tall
    Start button: 40 px tall
  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 white on dark green 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. Which button is too small?
    Next button: 72 px tall
    Done button: 48 px tall
    Save button: 28 px tall     (a) Save (b) Done (c) Next
  23. 23.True or false: icons with no meaning is good button design. (a) True (b) False
  24. 24.True or false: icons with no meaning is poor button design. (a) True (b) False
  25. 25.True or false: a clear word like Save is poor button design. (a) False (b) True
  26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Send button: 64 px tall
    Start button: 36 px tall     (a) Start (b) Back (c) Send
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
  29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Start button: 72 px tall
    Back button: 64 px tall     (a) Send (b) Back (c) Start
  31. 31.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Cancel button: 64 px tall
    Back button: 60 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Cancel button: 44 px tall
    Help button: 44 px tall
  36. 36.True or false: a tiny 20 px button is poor button design. (a) True (b) False
  37. 37.True or false: space between buttons is poor button design. (a) False (b) True
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Next button: 72 px tall
    Help button: 48 px tall     (a) Help (b) Next (c) Done
  39. 39.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  40. 40.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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