App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 573 · 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 hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) red on green
2. 2.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
5. 5.Which colour pair is easy to read? (a) white on black (b) yellow on white (c) light grey on white (d) dark blue on black
6. 6.True or false: grey text on grey is poor button design. (a) False (b) True
7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Done button is 32 px tall. How many px taller must it be?
9. 9.True or false: grey text on grey is good button design. (a) True (b) False
10. 10.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
11. 11.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) light grey on white (d) red on green
12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
13. 13.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Save button: 24 px tall
    Help button: 56 px tall
    Start button: 56 px tall (a) Start (b) Save (c) Next (d) Help
15. 15.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Send button: 32 px tall
    Cancel button: 60 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Done button: 60 px tall
    Cancel button: 56 px tall (a) Cancel (b) Next (c) Done
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
19. 19.Which colour pair is hard to read? (a) dark blue on white (b) pale pink on white (c) white on black (d) black on pale grey
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
22. 22.True or false: strong colour contrast is good button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Next button: 44 px tall
    Cancel button: 32 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Back button: 36 px tall
    Start button: 56 px tall
    Next button: 40 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
27. 27.Which colour pair is easy to read? (a) pale pink on white (b) black on yellow (c) light grey on white (d) dark blue on black
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Done button: 68 px tall
    Help button: 40 px tall (a) Help (b) Back (c) Done
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 48 px tall
    Done button: 44 px tall
    Back button: 44 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Help button: 48 px tall
    Back button: 56 px tall
    Save button: 36 px tall
33. 33.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
34. 34.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Back button: 24 px tall
    Cancel button: 68 px tall
    Done button: 68 px tall (a) Help (b) Cancel (c) Done (d) Back
36. 36.True or false: a clear word like Save is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Help button: 60 px tall
    Cancel button: 56 px tall
39. 39.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 44 px tall
    Save button: 72 px tall
    Back button: 72 px tall (a) Back (b) Save (c) Next

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