App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 148 · 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.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
2. 2.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
3. 3.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 28 px tall
   Cancel button: 60 px tall
   Start button: 52 px tall (a) Next (b) Cancel (c) Start
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
7. 7.True or false: a clear word like Save is poor button design. (a) False (b) True
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
9. 9.🌗 Is red on green 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?
    Save button: 48 px tall
    Start button: 48 px tall
    Done button: 64 px tall
11. 11.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) yellow on white (d) red on green
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Next button: 56 px tall
    Cancel button: 52 px tall
13. 13.True or false: icons with no meaning is poor button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 60 px tall
    Next button: 56 px tall
    Send button: 36 px tall (a) Help (b) Next (c) Send
15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 36 px tall
    Next button: 56 px tall
    Help button: 64 px tall
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Start button: 36 px tall
    Done button: 44 px tall
21. 21.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
22. 22.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.Which colour pair is hard to read? (a) red on green (b) white on black (c) white on dark green (d) dark blue on white
24. 24.True or false: strong colour contrast is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
26. 26.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) black on yellow
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Save button: 60 px tall
    Done button: 64 px tall (a) Save (b) Help (c) Done
28. 28.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) yellow on white (d) black on pale grey
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Cancel button: 72 px tall
    Start button: 68 px tall
    Done button: 64 px tall (a) Done (b) Send (c) Cancel (d) Start
31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.True or false: grey text on grey is good button design. (a) False (b) True
33. 33.True or false: buttons almost touching is good button design. (a) True (b) False
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Done button: 64 px tall
    Help button: 64 px tall
    Send button: 64 px tall (a) Send (b) Help (c) Done (d) Next
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 48 px tall
    Send button: 72 px tall
    Done button: 32 px tall
    Help button: 48 px tall (a) Help (b) Send (c) Back (d) Done
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Send button: 64 px tall
    Save button: 64 px tall
38. 38.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) black on yellow (d) black on pale grey
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?

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