App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 631 · 40 questions

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.

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

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