App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 624 · 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 Back button is 20 px tall. How many px taller must it be?
2. 2.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.True or false: strong colour contrast is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 64 px tall
   Send button: 36 px tall
   Save button: 32 px tall
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Next button: 64 px tall
   Done button: 56 px tall
7. 7.Which colour pair is hard to read? (a) black on yellow (b) dark blue on black (c) black on pale grey (d) dark blue on white
8. 8.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) light grey on white
9. 9.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 32 px tall
    Done button: 40 px tall
11. 11.True or false: icons with no meaning is good button design. (a) False (b) True
12. 12.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Done button: 60 px tall
    Cancel button: 24 px tall (a) Done (b) Cancel (c) Send
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Help button: 44 px tall
    Save button: 56 px tall
    Cancel button: 60 px tall (a) Done (b) Help (c) Save (d) Cancel
18. 18.True or false: a tiny 20 px button is good button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
20. 20.True or false: grey text on grey is poor button design. (a) True (b) False
21. 21.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
22. 22.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) dark blue on black (d) light grey on white
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 60 px tall
    Help button: 44 px tall
    Done button: 68 px tall (a) Next (b) Cancel (c) Done (d) Help
24. 24.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
25. 25.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on yellow (d) yellow on white
27. 27.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) yellow on white (d) white on black
28. 28.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
30. 30.True or false: buttons almost touching is good button design. (a) False (b) True
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Save button: 44 px tall
    Done button: 64 px tall
    Next button: 36 px tall
32. 32.True or false: a big, easy tap area is good button design. (a) False (b) True
33. 33.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
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Start button: 60 px tall
    Back button: 56 px tall
    Save button: 64 px tall (a) Cancel (b) Save (c) Start (d) Back
37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Next button: 64 px tall
    Help button: 32 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Help button: 48 px tall
    Send button: 52 px tall
    Next button: 72 px tall (a) Next (b) Help (c) Send (d) Cancel
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Done button: 60 px tall
    Cancel button: 64 px tall
    Save button: 36 px tall

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