App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 144 · 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 black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
3. 3.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) pale pink on white (d) red on green
4. 4.Which colour pair is easy to read? (a) red on green (b) dark blue on white (c) pale pink on white (d) dark blue on black
5. 5.True or false: icons with no meaning is poor button design. (a) True (b) False
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) white on dark green (c) dark blue on black (d) red on green
7. 7.True or false: icons with no meaning is good button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
9. 9.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) red on green (d) white on dark green
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Save button: 52 px tall
    Back button: 64 px tall
    Next button: 56 px tall (a) Next (b) Save (c) Help (d) Back
12. 12.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: space between buttons is good button design. (a) False (b) True
14. 14.True or false: a tiny 20 px button is poor button design. (a) False (b) True
15. 15.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) red on green (d) dark blue on black
16. 16.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
18. 18.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 44 px tall
    Next button: 36 px tall
    Back button: 36 px tall
    Help button: 36 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Back button: 36 px tall
    Done button: 56 px tall
21. 21.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Help button: 56 px tall
    Done button: 68 px tall
    Next button: 36 px tall (a) Save (b) Next (c) Done (d) Help
23. 23.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
24. 24.True or false: buttons almost touching is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
26. 26.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) yellow on white (d) black on pale grey
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Back button: 56 px tall
    Send button: 64 px tall (a) Back (b) Send (c) Save
28. 28.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.True or false: a tiny 20 px button is good button design. (a) True (b) False
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Start button: 28 px tall
    Cancel button: 56 px tall (a) Start (b) Help (c) Cancel
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
32. 32.True or false: a clear word like Save is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Done button: 36 px tall
    Send button: 48 px tall (a) Cancel (b) Done (c) Send
34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
35. 35.True or false: strong colour contrast is good button design. (a) True (b) False
36. 36.True or false: a big, easy tap area is poor button design. (a) False (b) True
37. 37.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Back 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?
    Next button: 60 px tall
    Back button: 24 px tall
    Help button: 72 px tall (a) Help (b) Next (c) Back
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Save button: 60 px tall
    Help button: 60 px tall (a) Start (b) Help (c) Save

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