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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 195 · 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. The Start button is 24 px tall. How many px taller must it be?
  2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Send button: 28 px tall
    Cancel button: 64 px tall     (a) Send (b) Cancel (c) Help
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
  5. 5.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Start button: 68 px tall
    Next button: 24 px tall
    Save button: 72 px tall     (a) Start (b) Send (c) Save (d) Next
  7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Next button: 68 px tall
    Help button: 48 px tall
    Cancel button: 64 px tall     (a) Next (b) Send (c) Help (d) Cancel
  9. 9.🌗 Is black on yellow 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. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 36 px tall
    Send button: 60 px tall
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Help button: 72 px tall
    Send button: 64 px tall
    Done button: 60 px tall     (a) Send (b) Help (c) Done (d) Next
  12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Done button: 72 px tall
    Back button: 52 px tall     (a) Done (b) Back (c) Save
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Back button: 52 px tall
    Start button: 44 px tall     (a) Back (b) Start (c) Send
  14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Next button: 60 px tall
    Done button: 36 px tall     (a) Done (b) Next (c) Back
  16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) pale pink on white (d) black on yellow
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 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?
    Done button: 60 px tall
    Cancel button: 36 px tall
    Next button: 72 px tall     (a) Done (b) Cancel (c) Next
  20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Next button: 60 px tall
    Save button: 32 px tall
    Start button: 64 px tall
  22. 22.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) dark blue on black (d) light grey on white
  23. 23.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) yellow on white
  24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Save button: 44 px tall
    Done button: 64 px tall
    Start button: 60 px tall
  25. 25.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) red on green
  26. 26.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) red on green (d) white on dark green
  27. 27.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Save button: 40 px tall
    Cancel button: 64 px tall
    Start button: 48 px tall
  29. 29.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
  30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Cancel button: 64 px tall
    Done button: 48 px tall
  31. 31.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) red on green (d) white on black
  33. 33.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Cancel button: 40 px tall
    Save button: 64 px tall
    Help button: 36 px tall
  35. 35.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on black (d) black on yellow
  36. 36.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
  38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Done button: 52 px tall
    Start button: 28 px tall
    Cancel button: 48 px tall     (a) Done (b) Cancel (c) Start (d) Save
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 60 px tall
    Back button: 48 px tall
    Save button: 44 px tall     (a) Save (b) Back (c) Cancel (d) Send
  40. 40.Which colour pair is hard to read? (a) white on dark green (b) dark blue on white (c) white on black (d) dark blue on black

Answer key

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

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