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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 145 · 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?
    Send button: 60 px tall
    Next button: 36 px tall
    Done button: 64 px tall     (a) Send (b) Done (c) Next
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Next button: 72 px tall
    Start button: 60 px tall     (a) Start (b) Next (c) Save
  3. 3.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 52 px tall
    Cancel button: 32 px tall
    Next button: 64 px tall
    Save button: 52 px tall
  5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 68 px tall
    Back button: 28 px tall
    Done button: 60 px tall     (a) Done (b) Help (c) Back
  6. 6.True or false: a tiny 20 px button is good button design. (a) False (b) True
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Save button: 44 px tall
    Cancel button: 40 px tall
  8. 8.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) black on pale grey
  9. 9.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on dark green (d) red on green
  10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Next button: 64 px tall
    Send button: 44 px tall
    Back button: 48 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Next button: 36 px tall
    Save button: 36 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Send button: 52 px tall
    Cancel button: 72 px tall     (a) Back (b) Send (c) Cancel
  13. 13.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Help button: 48 px tall
    Save button: 32 px tall
    Cancel button: 52 px tall
  15. 15.🌗 Is white on dark green 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. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Start button: 48 px tall
    Done button: 32 px tall
  17. 17.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Start button: 72 px tall
    Send button: 36 px tall     (a) Done (b) Start (c) Send
  19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 56 px tall
    Back button: 32 px tall     (a) Cancel (b) Done (c) Back
  20. 20.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
  21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Next button: 28 px tall
    Start button: 52 px tall
    Cancel button: 60 px tall     (a) Next (b) Start (c) Cancel (d) Back
  22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Next button: 44 px tall
    Start button: 64 px tall     (a) Next (b) Start (c) Cancel
  23. 23.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Cancel button: 52 px tall
    Done button: 56 px tall     (a) Cancel (b) Done (c) Start
  25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
  26. 26.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
  27. 27.True or false: grey text on grey is good button design. (a) True (b) False
  28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 40 px tall
    Back button: 56 px tall
    Done button: 60 px tall
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Next button: 48 px tall
    Help button: 44 px tall
  32. 32.True or false: grey text on grey is poor button design. (a) False (b) True
  33. 33.True or false: a clear word like Save is good button design. (a) True (b) False
  34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
  35. 35.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Back button: 64 px tall
    Cancel button: 64 px tall     (a) Back (b) Cancel (c) Save
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Start button: 52 px tall
    Back button: 36 px tall     (a) Back (b) Start (c) Cancel
  38. 38.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  39. 39.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Save button: 36 px tall
    Start button: 48 px tall
    Done button: 56 px tall

Answer key

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

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