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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 229 · 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: icons with no meaning? (a) poor design (b) good design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Next button: 24 px tall
    Help button: 52 px tall     (a) Help (b) Back (c) Next
  3. 3.True or false: buttons almost touching is good button design. (a) True (b) False
  4. 4.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) white on black (d) black on yellow
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 60 px tall
    Back button: 36 px tall     (a) Cancel (b) Back (c) Save
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Done button: 52 px tall
    Start button: 64 px tall
    Back button: 64 px tall     (a) Start (b) Done (c) Back (d) Send
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 24 px tall
    Done button: 64 px tall
    Next button: 72 px tall
    Send button: 68 px tall     (a) Start (b) Next (c) Send (d) Done
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Send button: 56 px tall
    Save button: 40 px tall
    Cancel button: 32 px tall
  9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Done button: 44 px tall
    Next button: 44 px tall
    Send button: 64 px tall
  10. 10.True or false: a big, easy tap area is good button design. (a) True (b) False
  11. 11.True or false: buttons almost touching is poor button design. (a) False (b) True
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Start button: 52 px tall
    Save button: 72 px tall     (a) Save (b) Send (c) Start
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Done button: 48 px tall
    Help button: 52 px tall
  15. 15.True or false: grey text on grey is poor button design. (a) True (b) False
  16. 16.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  18. 18.True or false: a big, easy tap area is poor button design. (a) False (b) True
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Send button: 60 px tall
    Save button: 48 px tall
  20. 20.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Send button: 56 px tall
    Next button: 56 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Cancel button: 48 px tall
    Done button: 60 px tall
    Start button: 56 px tall     (a) Next (b) Start (c) Cancel (d) Done
  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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Start button: 64 px tall
    Send button: 48 px tall     (a) Send (b) Start (c) Save
  25. 25.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  27. 27.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  30. 30.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 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?
    Done button: 44 px tall
    Save button: 56 px tall
    Next button: 52 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 56 px tall
    Done button: 48 px tall
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  34. 34.True or false: a clear word like Save is good button design. (a) True (b) False
  35. 35.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) red on green (d) light grey on white
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Start button: 48 px tall
    Cancel button: 60 px tall     (a) Start (b) Back (c) Cancel
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Next button: 64 px tall
    Start button: 56 px tall
    Back button: 72 px tall     (a) Next (b) Start (c) Save (d) Back
  38. 38.True or false: grey text on grey is good button design. (a) True (b) False
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Next button: 44 px tall
    Send button: 64 px tall
    Help button: 56 px tall
  40. 40.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) dark blue on black (d) dark blue on white

Answer key

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

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