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App Dev Worksheet: Button Size and Contrast

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

Answer key

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

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