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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 533 · 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?
    Start button: 28 px tall
    Cancel button: 56 px tall
    Next button: 48 px tall
    Back button: 48 px tall     (a) Next (b) Back (c) Start (d) Cancel
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Save button: 68 px tall
    Send button: 24 px tall     (a) Save (b) Send (c) Cancel
  3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Start button: 36 px tall
    Save button: 52 px tall
  4. 4.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  5. 5.Which colour pair is easy to read? (a) white on dark green (b) light grey on white (c) pale pink on white (d) yellow on white
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Save button: 40 px tall
    Help button: 72 px tall
    Start button: 72 px tall     (a) Save (b) Send (c) Start (d) Help
  7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Next button: 24 px tall
    Help button: 56 px tall     (a) Help (b) Send (c) Next
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 64 px tall
    Next button: 36 px tall     (a) Cancel (b) Next (c) Save
  9. 9.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  12. 12.True or false: a big, easy tap area is poor button design. (a) True (b) False
  13. 13.🌗 Is light grey 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. Which button is too small?
    Back button: 44 px tall
    Next button: 48 px tall
    Start button: 64 px tall     (a) Back (b) Next (c) Start
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Send button: 28 px tall
    Done button: 68 px tall
    Back button: 52 px tall     (a) Next (b) Back (c) Done (d) Send
  16. 16.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) black on pale grey (d) white on black
  17. 17.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  18. 18.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) dark blue on black (d) white on dark green
  19. 19.True or false: grey text on grey is poor button design. (a) False (b) True
  20. 20.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) pale pink on white (d) light grey on white
  21. 21.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) dark blue on white (d) black on yellow
  22. 22.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Start button: 64 px tall
    Send button: 56 px tall
    Help button: 56 px tall     (a) Send (b) Start (c) Done (d) Help
  24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  25. 25.True or false: space between buttons is poor button design. (a) False (b) True
  26. 26.True or false: space between buttons is good button design. (a) True (b) False
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
  28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
  29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Start button: 52 px tall
    Back button: 72 px tall
    Done button: 28 px tall     (a) Start (b) Done (c) Back (d) Cancel
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Cancel button: 64 px tall
    Done button: 64 px tall
  31. 31.Which colour pair is easy to read? (a) red on green (b) black on yellow (c) pale pink on white (d) yellow on white
  32. 32.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Save button: 72 px tall
    Back button: 28 px tall
    Start button: 52 px tall     (a) Save (b) Start (c) Next (d) Back
  35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Cancel button: 32 px tall
    Next button: 64 px tall     (a) Next (b) Cancel (c) Send
  36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Start button: 56 px tall
    Send button: 72 px tall     (a) Start (b) Send (c) Next
  37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 48 px tall
    Help button: 28 px tall     (a) Done (b) Save (c) Help
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Back button: 64 px tall
    Send button: 44 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Back button: 72 px tall
    Save button: 32 px tall
    Start button: 48 px tall     (a) Next (b) Start (c) Save (d) Back
  40. 40.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read

Answer key

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

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