App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 73 · 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.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
3. 3.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
4. 4.True or false: strong colour contrast is poor button design. (a) False (b) True
5. 5.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
6. 6.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: a clear word like Save is poor button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.Which colour pair is hard to read? (a) light grey on white (b) white on dark green (c) white on black (d) black on pale grey
12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 40 px tall
    Start button: 56 px tall (a) Send (b) Start (c) Help
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Cancel button: 48 px tall
    Back button: 56 px tall
    Help button: 52 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Save button: 48 px tall
    Next button: 40 px tall (a) Save (b) Start (c) Next
16. 16.True or false: icons with no meaning is good button design. (a) False (b) True
17. 17.True or false: a big, easy tap area is good button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
19. 19.True or false: a clear word like Save is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
22. 22.True or false: strong colour contrast is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 44 px tall
    Next button: 68 px tall
    Cancel button: 56 px tall
    Done button: 48 px tall (a) Start (b) Done (c) Next (d) Cancel
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Help button: 64 px tall
    Next button: 48 px tall (a) Next (b) Help (c) Cancel
25. 25.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) pale pink on white (d) light grey on white
26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Next button: 24 px tall
    Save button: 48 px tall (a) Send (b) Save (c) Next
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 40 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Start button: 24 px tall
    Back button: 56 px tall
    Help button: 48 px tall (a) Start (b) Help (c) Back (d) Next
32. 32.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) pale pink on white (d) black on pale grey
33. 33.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) white on dark green
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 24 px tall
    Send button: 56 px tall
    Help button: 72 px tall (a) Help (b) Save (c) Send
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Next button: 64 px tall
    Cancel button: 64 px tall
36. 36.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
37. 37.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
38. 38.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.True or false: space between buttons is good button design. (a) True (b) False
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?

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