App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 601 · 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 pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
3. 3.True or false: a big, easy tap area is poor button design. (a) True (b) False
4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
5. 5.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) pale pink on white (d) dark blue on white
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: space between buttons is poor button design. (a) False (b) True
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
9. 9.True or false: strong colour contrast is good button design. (a) True (b) False
10. 10.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) yellow on white (d) black on yellow
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
12. 12.True or false: space between buttons is good button design. (a) True (b) False
13. 13.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
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. Which button is too small?
    Start button: 72 px tall
    Cancel button: 48 px tall
    Next button: 44 px tall (a) Start (b) Cancel (c) Next
17. 17.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
19. 19.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
20. 20.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) light grey on white (d) black on pale grey
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
25. 25.Which colour pair is easy to read? (a) yellow on white (b) white on dark green (c) dark blue on black (d) light grey on white
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 44 px tall
    Back button: 64 px tall
    Save button: 60 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Cancel button: 48 px tall
    Send button: 36 px tall (a) Cancel (b) Send (c) Save
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Back button: 48 px tall
    Start button: 52 px tall (a) Start (b) Back (c) Help
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Back button: 32 px tall
    Next button: 56 px tall
    Save button: 52 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Cancel button: 52 px tall
    Help button: 32 px tall
32. 32.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) dark blue on white (d) dark blue on black
33. 33.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Help button is 44 px tall. How many px taller must it be?
35. 35.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Done button: 48 px tall
    Help button: 64 px tall (a) Help (b) Start (c) Done
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Cancel button: 72 px tall
    Next button: 36 px tall (a) Cancel (b) Back (c) Next
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Next button: 68 px tall
    Help button: 60 px tall (a) Next (b) Back (c) Help
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Cancel button: 68 px tall
    Save button: 48 px tall (a) Cancel (b) Send (c) Save

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