App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 681 · 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.True or false: a tiny 20 px button is good button design. (a) True (b) False
2. 2.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
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Start button: 40 px tall
   Cancel button: 52 px tall
4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.True or false: buttons almost touching is good button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) light grey on white (d) dark blue on black
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
8. 8.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
9. 9.True or false: grey text on grey is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Next button: 44 px tall
    Done button: 44 px tall
11. 11.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Send button: 36 px tall
    Next button: 56 px tall
14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.True or false: a big, easy tap area is poor button design. (a) False (b) True
16. 16.True or false: icons with no meaning is good button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
18. 18.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on dark green (d) dark blue on black
19. 19.Which colour pair is easy to read? (a) light grey on white (b) white on black (c) pale pink on white (d) yellow on white
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
21. 21.Which colour pair is easy to read? (a) pale pink on white (b) dark blue on black (c) light grey on white (d) black on yellow
22. 22.True or false: icons with no meaning is poor button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 36 px tall
    Done button: 60 px tall
    Start button: 52 px tall
    Send button: 48 px tall (a) Done (b) Send (c) Cancel (d) Start
24. 24.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) light grey on white (d) dark blue on white
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Cancel button: 48 px tall
    Send button: 56 px tall
    Next button: 60 px tall (a) Send (b) Save (c) Cancel (d) Next
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Cancel button: 56 px tall
    Back button: 48 px tall (a) Done (b) Back (c) Cancel
28. 28.True or false: strong colour contrast is poor button design. (a) False (b) True
29. 29.🔘 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
    Save button: 36 px tall
    Help button: 40 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Done button: 72 px tall
    Start button: 24 px tall (a) Done (b) Back (c) Start
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 72 px tall
    Send button: 36 px tall
    Done button: 48 px tall (a) Done (b) Start (c) Send
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 56 px tall
    Back button: 40 px tall
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Back button: 48 px tall
    Start button: 48 px tall (a) Back (b) Done (c) Start
34. 34.True or false: strong colour contrast is good button design. (a) True (b) False
35. 35.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Save button: 32 px tall
    Next button: 68 px tall (a) Save (b) Next (c) Cancel
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Help button: 44 px tall
    Send button: 48 px tall
    Next button: 40 px tall
38. 38.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 32 px tall
    Send button: 64 px tall
    Back button: 52 px tall (a) Done (b) Back (c) Send
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?

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