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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 373 · 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.

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  1. 1.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Next button: 72 px tall
    Help button: 72 px tall
    Send button: 44 px tall     (a) Save (b) Help (c) Next (d) Send
  2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Done button: 32 px tall
    Next button: 48 px tall     (a) Start (b) Done (c) Next
  4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Back button: 52 px tall
    Next button: 64 px tall
    Cancel button: 40 px tall
  6. 6.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  7. 7.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Send button: 60 px tall
    Start button: 52 px tall
  9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  10. 10.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) dark blue on black
  11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Help button: 56 px tall
    Next button: 64 px tall
    Save button: 44 px tall
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Help button: 36 px tall
    Done button: 64 px tall     (a) Save (b) Help (c) Done
  13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Start button: 60 px tall
    Next button: 52 px tall
    Back button: 48 px tall     (a) Next (b) Back (c) Start (d) Help
  16. 16.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) pale pink on white (d) red on green
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 28 px tall. How many px taller must it be?
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Done button: 48 px tall
    Cancel button: 48 px tall
  20. 20.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) white on dark green (d) dark blue on black
  21. 21.True or false: space between buttons is poor button design. (a) False (b) True
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Start button: 56 px tall
    Save button: 52 px tall
  24. 24.True or false: grey text on grey is good button design. (a) True (b) False
  25. 25.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  26. 26.True or false: grey text on grey is poor button design. (a) True (b) False
  27. 27.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 52 px tall
    Start button: 56 px tall
    Help button: 32 px tall
  29. 29.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) light grey on white (d) red on green
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 56 px tall
    Back button: 60 px tall
    Save button: 24 px tall     (a) Back (b) Save (c) Start
  31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Help button: 64 px tall
    Start button: 40 px tall
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 32 px tall
    Back button: 72 px tall     (a) Save (b) Back (c) Cancel
  33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Back button: 44 px tall
    Help button: 40 px tall
    Save button: 56 px tall
  35. 35.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) black on yellow
  36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Help button: 64 px tall
    Next button: 64 px tall     (a) Next (b) Back (c) Help
  38. 38.True or false: a clear word like Save is poor button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Done button: 44 px tall
    Next button: 44 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Send button: 32 px tall
    Start button: 44 px tall

Answer key

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

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