App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 470 · 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 red on green easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
3. 3.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) light grey on white (d) black on yellow
4. 4.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) red on green (d) white on dark green
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
7. 7.True or false: space between buttons is good button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
9. 9.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) yellow on white (d) black on yellow
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 68 px tall
    Cancel button: 32 px tall
    Next button: 48 px tall (a) Cancel (b) Next (c) Back
11. 11.True or false: a clear word like Save is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
13. 13.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
15. 15.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on black (d) pale pink on white
16. 16.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Done button: 48 px tall
    Save button: 48 px tall
    Start button: 64 px tall (a) Done (b) Start (c) Save (d) Cancel
18. 18.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Next button: 48 px tall
    Cancel button: 56 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 40 px tall
    Save button: 44 px tall
    Start button: 52 px tall
    Send button: 36 px tall
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 48 px tall
    Start button: 52 px tall
22. 22.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) light grey on white (d) white on black
23. 23.True or false: strong colour contrast is good button design. (a) True (b) False
24. 24.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) dark blue on black (d) red on green
25. 25.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 64 px tall
    Start button: 56 px tall
27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
28. 28.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) dark blue on white (d) white on dark green
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Help button: 32 px tall
    Start button: 52 px tall
30. 30.True or false: a tiny 20 px button is good button design. (a) True (b) False
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 44 px tall
    Cancel button: 48 px tall
    Save button: 48 px tall (a) Save (b) Send (c) Cancel
33. 33.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.True or false: strong colour contrast is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Next button: 40 px tall
    Help button: 52 px tall (a) Help (b) Next (c) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Save button: 52 px tall
    Back button: 24 px tall
    Help button: 52 px tall (a) Cancel (b) Back (c) Help (d) Save
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 44 px tall
    Send button: 40 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Cancel button: 64 px tall
    Back button: 48 px tall
39. 39.True or false: buttons almost touching is poor button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 56 px tall
    Back button: 40 px tall
    Start button: 48 px tall
    Send button: 64 px tall

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