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App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 457 · 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.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
  2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Start button: 48 px tall
    Next button: 44 px tall
    Cancel button: 56 px tall     (a) Save (b) Cancel (c) Next (d) Start
  3. 3.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
  4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
  5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Start button: 60 px tall
    Send button: 40 px tall
  6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Done button: 64 px tall
    Next button: 60 px tall
    Start button: 56 px tall     (a) Start (b) Save (c) Done (d) Next
  7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Done button: 40 px tall
    Help button: 48 px tall
  8. 8.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) dark blue on black (d) yellow on white
  9. 9.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Start button: 36 px tall
    Next button: 72 px tall
    Send button: 60 px tall     (a) Save (b) Send (c) Start (d) Next
  11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
  12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
  13. 13.True or false: grey text on grey is poor button design. (a) True (b) False
  14. 14.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
  15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
  16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Cancel button: 36 px tall
    Send button: 60 px tall     (a) Cancel (b) Help (c) Send
  18. 18.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) light grey on white (d) white on dark green
  19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Start button: 40 px tall
    Cancel button: 32 px tall
    Help button: 32 px tall
  20. 20.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) red on green (d) white on dark green
  21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 64 px tall
    Back button: 56 px tall
    Send button: 56 px tall
  22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
  23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Back button: 44 px tall
    Help button: 48 px tall     (a) Start (b) Back (c) Help
  24. 24.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Next button: 40 px tall
    Send button: 60 px tall
  26. 26.True or false: icons with no meaning is poor button design. (a) True (b) False
  27. 27.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Back button: 60 px tall
    Save button: 60 px tall
  29. 29.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on black (d) white on black
  30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 44 px tall
    Send button: 68 px tall
    Help button: 72 px tall
    Done button: 72 px tall     (a) Back (b) Help (c) Send (d) Done
  31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
  32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Start button: 32 px tall
    Save button: 60 px tall
  33. 33.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) white on black
  34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Help button: 40 px tall
    Send button: 44 px tall
    Save button: 64 px tall
  35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Save button: 52 px tall
    Send button: 64 px tall
    Done button: 40 px tall
  37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
  38. 38.True or false: icons with no meaning is good button design. (a) False (b) True
  39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 60 px tall
    Send button: 28 px tall     (a) Start (b) Done (c) Send
  40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Send button: 60 px tall
    Next button: 68 px tall     (a) Send (b) Next (c) Save

Answer key

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

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