App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 274 · 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.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) white on black (d) pale pink on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 48 px tall
   Done button: 48 px tall
   Next button: 32 px tall
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 64 px tall
   Send button: 24 px tall
   Done button: 64 px tall (a) Done (b) Back (c) Send
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 48 px tall
   Start button: 32 px tall
   Back button: 36 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 36 px tall
   Back button: 48 px tall
   Cancel button: 44 px tall
6. 6.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) black on pale grey (d) black on yellow
7. 7.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
9. 9.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) white on dark green (d) light grey on white
10. 10.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
11. 11.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Send button: 60 px tall
    Save button: 40 px tall (a) Send (b) Save (c) Help
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
14. 14.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Done button: 64 px tall
    Next button: 24 px tall (a) Next (b) Done (c) Cancel
16. 16.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
17. 17.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) red on green (d) yellow on white
18. 18.True or false: strong colour contrast is good button design. (a) True (b) False
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 56 px tall
    Help button: 60 px tall
23. 23.True or false: a clear word like Save is poor button design. (a) True (b) False
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Send button: 64 px tall
    Back button: 60 px tall (a) Next (b) Send (c) Back
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Start button: 68 px tall
    Next button: 24 px tall (a) Next (b) Done (c) Start
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 48 px tall
    Save button: 68 px tall
    Done button: 44 px tall (a) Send (b) Save (c) Done (d) Back
30. 30.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on black (d) white on dark green
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 52 px tall
    Cancel button: 60 px tall
    Send button: 48 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Done button: 48 px tall
    Back button: 28 px tall
    Save button: 72 px tall (a) Done (b) Save (c) Back (d) Start
33. 33.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 72 px tall
    Help button: 24 px tall
    Next button: 64 px tall (a) Send (b) Next (c) Help (d) Back
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Help button: 32 px tall
    Done button: 68 px tall
    Back button: 64 px tall (a) Done (b) Back (c) Help (d) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
37. 37.True or false: a big, easy tap area is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
39. 39.True or false: space between buttons is poor button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?

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