App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 428 · 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 easy to read? (a) white on black (b) yellow on white (c) pale pink on white (d) red on green
2. 2.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.True or false: a tiny 20 px button is poor button design. (a) True (b) False
4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 56 px tall
   Send button: 60 px tall
   Cancel button: 36 px tall
   Start button: 64 px tall
6. 6.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
7. 7.True or false: icons with no meaning is poor button design. (a) False (b) True
8. 8.True or false: grey text on grey is poor button design. (a) False (b) True
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
10. 10.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on yellow (d) yellow on white
11. 11.True or false: strong colour contrast is poor button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) pale pink on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Done button: 36 px tall
    Save button: 64 px tall
    Back button: 56 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Cancel button: 60 px tall
    Back button: 40 px tall (a) Cancel (b) Done (c) Back
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
18. 18.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) red on green (d) white on dark green
19. 19.True or false: buttons almost touching is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 32 px tall
    Done button: 56 px tall
    Next button: 36 px tall
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
27. 27.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Cancel button: 56 px tall
    Next button: 32 px tall (a) Back (b) Next (c) Cancel
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
30. 30.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Back button: 52 px tall
    Help button: 40 px tall
33. 33.Which colour pair is hard to read? (a) white on black (b) dark blue on black (c) dark blue on white (d) black on yellow
34. 34.True or false: icons with no meaning is good button design. (a) False (b) True
35. 35.True or false: a tiny 20 px button is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Start button: 60 px tall
    Send button: 56 px tall
    Cancel button: 24 px tall (a) Send (b) Cancel (c) Help (d) Start
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Send button: 52 px tall
    Back button: 60 px tall
    Save button: 52 px tall (a) Cancel (b) Save (c) Back (d) Send
38. 38.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
39. 39.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
40. 40.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design

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