App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 411 · 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.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) white on black (d) pale pink on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Save button: 32 px tall
   Done button: 60 px tall
   Back button: 68 px tall (a) Save (b) Back (c) Done
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
4. 4.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 44 px tall
   Back button: 48 px tall
   Cancel button: 48 px tall
7. 7.True or false: a clear word like Save is good button design. (a) True (b) False
8. 8.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Next button: 56 px tall
    Send button: 64 px tall
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Start button: 32 px tall
    Cancel button: 64 px tall
14. 14.True or false: a tiny 20 px button is good button design. (a) False (b) True
15. 15.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on black (d) dark blue on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Start button: 32 px tall
    Cancel button: 48 px tall
19. 19.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Back button: 64 px tall
    Next button: 40 px tall (a) Next (b) Back (c) Help
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 60 px tall
    Send button: 64 px tall
    Help button: 40 px tall
22. 22.Which colour pair is hard to read? (a) dark blue on white (b) black on yellow (c) white on dark green (d) dark blue on black
23. 23.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 52 px tall
    Save button: 64 px tall
    Send button: 56 px tall (a) Save (b) Done (c) Send (d) Help
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Send button: 48 px tall
    Save button: 64 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Send button: 32 px tall
    Save button: 68 px tall
    Done button: 56 px tall (a) Send (b) Start (c) Save (d) Done
27. 27.True or false: strong colour contrast is poor button design. (a) False (b) True
28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
29. 29.True or false: icons with no meaning is good button design. (a) True (b) False
30. 30.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on yellow (d) black on pale grey
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
33. 33.Which colour pair is hard to read? (a) pale pink on white (b) black on pale grey (c) white on black (d) white on dark green
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 56 px tall
    Save button: 56 px tall
    Send button: 44 px tall
36. 36.True or false: grey text on grey is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Start button: 40 px tall
    Send button: 60 px tall (a) Next (b) Start (c) Send
38. 38.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Send button: 44 px tall
    Start button: 48 px tall
    Next button: 44 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Help button: 72 px tall
    Back button: 28 px tall (a) Next (b) Help (c) Back

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