App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 182 · 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.True or false: a big, easy tap area is poor button design. (a) False (b) True
2. 2.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
4. 4.🌗 Is light grey 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: icons with no meaning? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Back button: 52 px tall
   Cancel button: 36 px tall (a) Back (b) Cancel (c) Next
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 64 px tall
   Back button: 56 px tall
   Send button: 60 px tall
9. 9.🔘 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
   Done button: 60 px tall
   Back button: 64 px tall
10. 10.True or false: a tiny 20 px button is poor button design. (a) True (b) False
11. 11.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) black on pale grey (d) yellow on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Cancel button: 48 px tall
    Save button: 36 px tall (a) Save (b) Help (c) Cancel
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Save button: 56 px tall
    Cancel button: 56 px tall
    Help button: 44 px tall (a) Help (b) Cancel (c) Done (d) Save
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 72 px tall
    Back button: 44 px tall
    Cancel button: 52 px tall
    Next button: 48 px tall (a) Back (b) Next (c) Cancel (d) Send
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Help button: 64 px tall
    Next button: 60 px tall
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
18. 18.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 64 px tall
    Back button: 40 px tall (a) Cancel (b) Save (c) Back
21. 21.Which colour pair is easy to read? (a) black on yellow (b) red on green (c) pale pink on white (d) yellow on white
22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Help button: 60 px tall
    Send button: 24 px tall (a) Send (b) Help (c) Back
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Back button: 24 px tall
    Save button: 56 px tall (a) Save (b) Back (c) Help
25. 25.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Cancel button: 60 px tall
    Send button: 52 px tall (a) Done (b) Send (c) Cancel
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Send button: 40 px tall
    Save button: 56 px tall
    Done button: 60 px tall
29. 29.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 32 px tall
    Start button: 64 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Next button: 36 px tall
    Back button: 64 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Next button: 32 px tall
    Save button: 48 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
35. 35.True or false: a tiny 20 px button is good button design. (a) True (b) False
36. 36.True or false: grey text on grey is good button design. (a) True (b) False
37. 37.True or false: grey text on grey is poor button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
39. 39.True or false: a clear word like Save is good button design. (a) False (b) True
40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design

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