App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 639 · 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 Done button is 40 px tall. How many px taller must it be?
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 52 px tall
   Start button: 64 px tall
   Save button: 40 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
8. 8.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
10. 10.True or false: a tiny 20 px button is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Cancel button: 36 px tall
    Send button: 68 px tall
    Help button: 48 px tall (a) Send (b) Cancel (c) Help (d) Done
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 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?
    Save button: 52 px tall
    Start button: 32 px tall
    Done button: 52 px tall
    Cancel button: 44 px tall
15. 15.Which colour pair is hard to read? (a) black on pale grey (b) yellow on white (c) dark blue on white (d) white on dark green
16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Done button: 40 px tall
    Send button: 32 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Help button: 48 px tall
    Back button: 64 px tall
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
20. 20.Which colour pair is easy to read? (a) yellow on white (b) black on pale grey (c) red on 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?
    Next button: 56 px tall
    Save button: 36 px tall
    Back button: 52 px tall
22. 22.Which colour pair is easy to read? (a) red on green (b) white on dark green (c) yellow on white (d) dark blue on black
23. 23.True or false: a clear word like Save is good button design. (a) False (b) True
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 24 px tall
    Start button: 68 px tall
    Save button: 52 px tall (a) Send (b) Next (c) Save (d) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Cancel button: 56 px tall
    Next button: 48 px tall
    Send button: 56 px tall (a) Cancel (b) Send (c) Help (d) Next
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Cancel button: 60 px tall
    Send button: 56 px tall
    Save button: 40 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Start button: 60 px tall
    Save button: 44 px tall
    Next button: 36 px tall
28. 28.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 48 px tall
    Send button: 32 px tall
30. 30.True or false: a tiny 20 px button is poor button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
32. 32.True or false: space between buttons is poor button design. (a) True (b) False
33. 33.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) dark blue on black
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
35. 35.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 44 px tall
    Back button: 52 px tall
    Send button: 64 px tall
    Cancel button: 60 px tall
37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 24 px tall
    Next button: 60 px tall (a) Next (b) Help (c) Start
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Cancel button: 56 px tall
    Send button: 64 px tall (a) Next (b) Cancel (c) Send
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?

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