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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 564 · 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 white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Start button: 60 px tall
    Send button: 40 px tall
    Back button: 64 px tall     (a) Start (b) Back (c) Done (d) Send
  3. 3.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
  4. 4.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  6. 6.True or false: grey text on grey is poor button design. (a) True (b) False
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Start button: 28 px tall
    Save button: 68 px tall
    Help button: 72 px tall     (a) Help (b) Save (c) Cancel (d) Start
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Help button: 52 px tall
    Cancel button: 72 px tall     (a) Done (b) Cancel (c) Help
  9. 9.True or false: a big, easy tap area is poor button design. (a) True (b) False
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 48 px tall
    Back button: 44 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 64 px tall
    Next button: 36 px tall
    Save button: 56 px tall
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  14. 14.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on black (d) light grey on white
  15. 15.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
  16. 16.Which colour pair is hard to read? (a) pale pink on white (b) white on black (c) black on yellow (d) white on dark green
  17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 48 px tall
    Send button: 64 px tall
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Save button: 40 px tall
    Next button: 48 px tall
    Back button: 48 px tall     (a) Cancel (b) Next (c) Back (d) Save
  20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 40 px tall
    Save button: 64 px tall
  21. 21.True or false: a tiny 20 px button is good button design. (a) True (b) False
  22. 22.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  23. 23.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) light grey on white (d) dark blue on black
  24. 24.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
  25. 25.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Next button: 44 px tall
    Done button: 60 px tall
    Cancel button: 48 px tall
  27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 56 px tall
    Back button: 32 px tall
    Send button: 40 px tall
  28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Save button: 36 px tall
    Back button: 68 px tall
    Start button: 60 px tall     (a) Cancel (b) Back (c) Save (d) Start
  29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Save button: 56 px tall
    Cancel button: 48 px tall
    Done button: 36 px tall
  30. 30.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  31. 31.True or false: icons with no meaning is good button design. (a) True (b) False
  32. 32.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Help button: 48 px tall
    Done button: 56 px tall
    Start button: 64 px tall     (a) Save (b) Start (c) Done (d) Help
  34. 34.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) dark blue on black (d) yellow on white
  35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Help button: 64 px tall
    Cancel button: 36 px tall
    Send button: 60 px tall
  36. 36.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  37. 37.True or false: grey text on grey is good button design. (a) True (b) False
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 40 px tall
    Send button: 64 px tall
    Start button: 64 px tall
    Cancel button: 72 px tall     (a) Send (b) Start (c) Done (d) Cancel
  39. 39.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  40. 40.True or false: a clear word like Save is poor button design. (a) False (b) True

Answer key

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

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