App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 237 · 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 this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
2. 2.True or false: space between buttons is poor button design. (a) True (b) False
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 32 px tall
   Next button: 40 px tall
   Done button: 52 px tall
5. 5.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
8. 8.True or false: strong colour contrast is poor button design. (a) True (b) False
9. 9.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
12. 12.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Help button: 44 px tall
    Start button: 32 px tall
    Save button: 48 px tall
14. 14.True or false: buttons almost touching is poor button design. (a) True (b) False
15. 15.True or false: space between buttons is good button design. (a) False (b) True
16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Cancel button: 36 px tall
    Send button: 64 px tall (a) Send (b) Cancel (c) Help
18. 18.True or false: a clear word like Save is poor button design. (a) True (b) False
19. 19.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on pale grey (d) dark blue on black
20. 20.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) dark blue on black
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Start button: 36 px tall
    Done button: 40 px tall
22. 22.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Save button: 56 px tall
    Next button: 48 px tall
    Cancel button: 72 px tall (a) Cancel (b) Next (c) Done (d) Save
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
25. 25.True or false: a tiny 20 px button is good button design. (a) True (b) False
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 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?
    Next button: 56 px tall
    Cancel button: 24 px tall
    Save button: 68 px tall (a) Cancel (b) Save (c) Next
28. 28.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on white (d) light grey on white
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Start button: 44 px tall
    Next button: 56 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Cancel button: 48 px tall
    Start button: 48 px tall (a) Cancel (b) Save (c) Start
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 72 px tall
    Help button: 28 px tall
    Send button: 48 px tall
    Save button: 52 px tall (a) Cancel (b) Save (c) Send (d) Help
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) yellow on white (d) black on pale grey
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 72 px tall
    Back button: 32 px tall
    Cancel button: 52 px tall (a) Cancel (b) Save (c) Back (d) Help
35. 35.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) yellow on white (d) light grey on white
36. 36.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) pale pink on white (d) white on dark green
37. 37.True or false: grey text on grey is poor button design. (a) False (b) True
38. 38.True or false: a big, easy tap area is good button design. (a) False (b) True
39. 39.True or false: a tiny 20 px button is poor button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?

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