App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 178 · 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: grey text on grey is poor button design. (a) True (b) False
2. 2.True or false: a tiny 20 px button is poor button design. (a) True (b) False
3. 3.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 40 px tall
   Send button: 56 px tall
   Start button: 52 px tall (a) Start (b) Help (c) Send
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) yellow on white (d) red on green
5. 5.Which colour pair is easy to read? (a) yellow on white (b) pale pink on white (c) light grey on white (d) white on dark green
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
7. 7.Which colour pair is hard to read? (a) black on yellow (b) pale pink on white (c) black on pale grey (d) white on dark green
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. How many of these buttons follow the rule?
   Help button: 32 px tall
   Cancel button: 36 px tall
   Back button: 40 px tall
   Done button: 36 px tall
10. 10.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
11. 11.🌗 Is yellow on white 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) good design (b) poor design
13. 13.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Back button: 44 px tall
    Save button: 52 px tall
    Send button: 44 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Start button: 40 px tall
    Next button: 52 px tall
    Send button: 32 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
18. 18.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) yellow on white (d) dark blue on white
19. 19.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
20. 20.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 48 px tall
    Back button: 48 px tall
    Cancel button: 56 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 52 px tall
    Send button: 68 px tall
    Cancel button: 36 px tall (a) Cancel (b) Help (c) Send
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Done button: 56 px tall
    Send button: 48 px tall (a) Send (b) Done (c) Help
25. 25.True or false: a clear word like Save is poor button design. (a) False (b) True
26. 26.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) yellow on white (d) dark blue on white
28. 28.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Done button: 44 px tall
    Help button: 52 px tall (a) Done (b) Start (c) Help
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 48 px tall
    Next button: 40 px tall
    Back button: 32 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Help button: 72 px tall
    Next button: 32 px tall
    Start button: 60 px tall (a) Next (b) Cancel (c) Start (d) Help
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Done button: 52 px tall
    Cancel button: 52 px tall
    Start button: 44 px tall
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
35. 35.True or false: a clear word like Save is good button design. (a) False (b) True
36. 36.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
37. 37.True or false: space between buttons is poor button design. (a) False (b) True
38. 38.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?

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