App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 43 · 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. Which button is too small?
   Done button: 68 px tall
   Next button: 36 px tall
   Save button: 56 px tall (a) Next (b) Save (c) Done
2. 2.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) black on pale grey (d) dark blue on black
3. 3.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
4. 4.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
5. 5.True or false: a clear word like Save is good button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
7. 7.True or false: a big, easy tap area is good button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Help button: 56 px tall
    Cancel button: 24 px tall
    Done button: 68 px tall (a) Done (b) Cancel (c) Send (d) Help
11. 11.True or false: buttons almost touching is poor button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Next button: 36 px tall
    Save button: 36 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Done button: 36 px tall
    Send button: 60 px tall
    Save button: 56 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
15. 15.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Back button: 56 px tall
    Next button: 48 px tall
    Cancel button: 32 px tall
17. 17.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Cancel button: 44 px tall
    Send button: 40 px tall
    Next button: 36 px tall
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: space between buttons is poor button design. (a) True (b) False
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
23. 23.True or false: buttons almost touching is good button design. (a) True (b) False
24. 24.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) pale pink on white (d) dark blue on black
25. 25.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) pale pink on white (d) red on green
26. 26.Which colour pair is hard to read? (a) light grey on white (b) black on pale grey (c) dark blue on white (d) white on dark green
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Send button: 60 px tall
    Cancel button: 36 px tall (a) Send (b) Cancel (c) Done
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Save button: 40 px tall
    Start button: 52 px tall
29. 29.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
30. 30.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) black on pale grey (d) white on dark green
33. 33.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Cancel button: 60 px tall
    Send button: 52 px tall (a) Send (b) Start (c) Cancel
35. 35.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) pale pink on white (d) white on dark green
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 64 px tall
    Send button: 60 px tall
    Cancel button: 40 px tall
    Help button: 56 px tall (a) Send (b) Help (c) Cancel (d) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Cancel button: 52 px tall
    Help button: 56 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Next button: 48 px tall
    Done button: 36 px tall
    Send button: 68 px tall (a) Save (b) Done (c) Send (d) Next
40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design

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