App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 239 · 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.True or false: space between buttons is good button design. (a) True (b) False
3. 3.True or false: a tiny 20 px button is good button design. (a) True (b) False
4. 4.True or false: icons with no meaning is poor button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) red on green (d) white on dark green
7. 7.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on black (d) dark blue on white
8. 8.True or false: a clear word like Save is good button design. (a) True (b) False
9. 9.Which colour pair is easy to read? (a) black on yellow (b) dark blue on black (c) yellow on white (d) pale pink on white
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 56 px tall
    Cancel button: 52 px tall
    Help button: 44 px tall (a) Cancel (b) Save (c) Help
11. 11.True or false: space between buttons is poor button design. (a) False (b) True
12. 12.Which colour pair is hard to read? (a) light grey on white (b) black on yellow (c) dark blue on white (d) black on pale grey
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 36 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 36 px tall
    Help button: 56 px tall (a) Cancel (b) Help (c) Back
16. 16.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 52 px tall
    Back button: 40 px tall
    Done button: 64 px tall
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
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 yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 28 px tall
    Cancel button: 68 px tall
    Next button: 60 px tall
    Done button: 48 px tall (a) Done (b) Cancel (c) Next (d) Send
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Start button: 56 px tall
    Send button: 48 px tall
    Cancel button: 44 px tall (a) Send (b) Cancel (c) Start (d) Back
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 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?
    Next button: 36 px tall
    Back button: 48 px tall
    Send button: 32 px tall
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Start button: 40 px tall
    Next button: 48 px tall
    Send button: 36 px tall
29. 29.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Start button: 56 px tall
    Send button: 60 px tall
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Back button: 52 px tall
    Save button: 72 px tall
    Done button: 68 px tall (a) Back (b) Start (c) Save (d) Done
31. 31.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on black (d) pale pink on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Done button: 52 px tall
    Next button: 24 px tall
    Save button: 68 px tall (a) Next (b) Done (c) Save (d) Back
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 28 px tall
    Next button: 64 px tall
    Cancel button: 64 px tall (a) Cancel (b) Back (c) Next
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Cancel button: 48 px tall
    Done button: 48 px tall
    Next button: 64 px tall (a) Save (b) Done (c) Next (d) Cancel
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.Which colour pair is hard to read? (a) dark blue on black (b) dark blue on white (c) white on black (d) black on yellow
39. 39.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) dark blue on black (d) white on dark green
40. 40.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design

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