App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 264 · 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) red on green (b) pale pink on white (c) white on dark green (d) yellow on white
2. 2.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 48 px tall
   Next button: 60 px tall
   Back button: 28 px tall (a) Next (b) Back (c) Send
4. 4.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
6. 6.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
7. 7.True or false: space between buttons is poor button design. (a) True (b) False
8. 8.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Cancel button: 56 px tall
    Done button: 40 px tall
    Back button: 56 px tall
11. 11.True or false: a clear word like Save is good button design. (a) True (b) False
12. 12.True or false: buttons almost touching is poor button design. (a) True (b) False
13. 13.True or false: a big, easy tap area is good button design. (a) False (b) True
14. 14.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) pale pink on white (d) yellow on white
15. 15.True or false: buttons almost touching is good button design. (a) True (b) False
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.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 40 px tall
    Done button: 48 px tall
    Send button: 56 px tall
    Next button: 48 px tall (a) Help (b) Next (c) Send (d) Done
20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
21. 21.🌗 Is dark blue on black 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. Which button is too small?
    Send button: 24 px tall
    Cancel button: 72 px tall
    Save button: 48 px tall (a) Save (b) Send (c) Cancel
23. 23.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.True or false: a clear word like Save is poor button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 36 px tall
    Help button: 32 px tall
    Start button: 60 px tall
26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 24 px tall
    Next button: 56 px tall (a) Cancel (b) Back (c) Next
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Save button: 72 px tall
    Help button: 48 px tall (a) Start (b) Help (c) Save
29. 29.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
30. 30.Which colour pair is hard to read? (a) pale pink on white (b) black on yellow (c) white on dark green (d) dark blue on white
31. 31.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
32. 32.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Send button: 36 px tall
    Done button: 48 px tall (a) Send (b) Next (c) Done
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Start button: 28 px tall
    Back button: 48 px tall
    Send button: 52 px tall (a) Next (b) Send (c) Start (d) Back
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Back button: 24 px tall
    Done button: 48 px tall (a) Help (b) Done (c) Back
36. 36.Which colour pair is hard to read? (a) white on black (b) yellow on white (c) white on dark green (d) dark blue on white
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Help button: 72 px tall
    Back button: 68 px tall
    Done button: 28 px tall (a) Save (b) Done (c) Help (d) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?

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