← Buttons: size and contrast lesson New set →

App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 241 · 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.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
  2. 2.True or false: space between buttons is good button design. (a) True (b) False
  3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 36 px tall
    Send button: 72 px tall
    Save button: 52 px tall     (a) Save (b) Back (c) Send
  4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Help button: 52 px tall
    Next button: 40 px tall
  5. 5.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
  6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Help button: 40 px tall
    Start button: 52 px tall
  7. 7.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) black on yellow (d) white on dark green
  8. 8.Which colour pair is easy to read? (a) light grey on white (b) black on pale grey (c) red on green (d) pale pink on white
  9. 9.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) black on pale grey (d) white on dark green
  10. 10.True or false: icons with no meaning is poor button design. (a) False (b) True
  11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Back button: 60 px tall
    Help button: 52 px tall
    Cancel button: 36 px tall     (a) Back (b) Next (c) Cancel (d) Help
  12. 12.True or false: grey text on grey is poor button design. (a) False (b) True
  13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Help button: 64 px tall
    Save button: 24 px tall     (a) Save (b) Start (c) Help
  14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 32 px tall
    Send button: 60 px tall
    Done button: 48 px tall
    Back button: 48 px tall     (a) Send (b) Done (c) Save (d) Back
  15. 15.True or false: a tiny 20 px button is poor button design. (a) False (b) True
  16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Next button: 68 px tall
    Start button: 68 px tall
    Done button: 56 px tall     (a) Done (b) Start (c) Next (d) Save
  17. 17.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
  18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
  19. 19.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
  20. 20.True or false: icons with no meaning is good button design. (a) True (b) False
  21. 21.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) dark blue on white (d) red on green
  22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Done button: 44 px tall
    Back button: 36 px tall
  23. 23.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
  24. 24.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
  25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 44 px tall
    Send button: 48 px tall
  26. 26.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) yellow on white (d) light grey on white
  27. 27.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
  28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Done button: 32 px tall
    Next button: 64 px tall
  29. 29.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) dark blue on black (d) black on pale grey
  30. 30.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
  31. 31.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
  32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 60 px tall
    Start button: 56 px tall
    Done button: 36 px tall     (a) Send (b) Cancel (c) Done (d) Start
  33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Help button: 36 px tall
    Cancel button: 52 px tall     (a) Cancel (b) Help (c) Done
  34. 34.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
  35. 35.Which colour pair is easy to read? (a) black on yellow (b) pale pink on white (c) light grey on white (d) yellow on white
  36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Send button: 56 px tall
    Next button: 36 px tall
    Start button: 32 px tall
  37. 37.True or false: a big, easy tap area is good button design. (a) True (b) False
  38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 40 px tall
    Send button: 48 px tall
  39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Save button: 52 px tall
    Send button: 56 px tall
    Done button: 48 px tall
  40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Done button: 40 px tall
    Cancel button: 48 px tall
    Help button: 48 px tall

Answer key

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

Free app development lessons, practice and worksheets at talentjr.in/app-development-for-students