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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 342 · 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. How many of these buttons follow the rule?
    Help button: 56 px tall
    Start button: 52 px tall
    Save button: 40 px tall
    Cancel button: 52 px tall
  2. 2.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  3. 3.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Help button: 44 px tall
    Start button: 44 px tall
    Back button: 32 px tall
  6. 6.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) white on black (d) yellow on white
  7. 7.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🌗 Is pale pink 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. The Back button is 20 px tall. How many px taller must it be?
  10. 10.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Save button: 56 px tall
    Help button: 36 px tall     (a) Save (b) Cancel (c) Help
  12. 12.True or false: grey text on grey is poor button design. (a) False (b) True
  13. 13.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 32 px tall
    Send button: 56 px tall
  15. 15.True or false: icons with no meaning is good button design. (a) False (b) True
  16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 44 px tall
    Back button: 52 px tall
  17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Save button: 24 px tall
    Cancel button: 72 px tall
    Start button: 68 px tall     (a) Start (b) Cancel (c) Help (d) Save
  19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  20. 20.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on black (d) black on pale grey
  21. 21.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) dark blue on white (d) red on green
  22. 22.True or false: a big, easy tap area is good button design. (a) True (b) False
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 32 px tall
    Done button: 72 px tall
    Save button: 72 px tall
    Start button: 48 px tall     (a) Start (b) Done (c) Next (d) Save
  24. 24.True or false: a clear word like Save is good button design. (a) True (b) False
  25. 25.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  26. 26.True or false: a clear word like Save is poor button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Start button: 60 px tall
    Done button: 28 px tall
    Save button: 68 px tall     (a) Start (b) Done (c) Send (d) Save
  28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Send button: 48 px tall
    Help button: 44 px tall
    Cancel button: 60 px tall
  30. 30.True or false: icons with no meaning is poor button design. (a) False (b) True
  31. 31.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
  34. 34.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) white on dark green (d) yellow on white
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  36. 36.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) light grey on white (d) black on pale grey
  37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Done button: 56 px tall
    Save button: 60 px tall
    Send button: 64 px tall
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Save button: 36 px tall
    Cancel button: 44 px tall
  39. 39.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  40. 40.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) black on pale grey (d) yellow on white

Answer key

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

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