App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 578 · 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.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 24 px tall
   Save button: 64 px tall
   Cancel button: 60 px tall (a) Start (b) Cancel (c) Save
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
4. 4.True or false: icons with no meaning is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Send button: 56 px tall
   Help button: 40 px tall (a) Send (b) Next (c) Help
9. 9.Which colour pair is easy to read? (a) black on pale grey (b) light grey on white (c) red on green (d) dark blue on black
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 28 px tall
    Save button: 52 px tall
    Cancel button: 52 px tall (a) Done (b) Cancel (c) Send (d) Save
11. 11.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) pale pink on white (d) white on black
12. 12.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
13. 13.True or false: space between buttons is good button design. (a) False (b) True
14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.True or false: a big, easy tap area is poor button design. (a) False (b) True
16. 16.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
17. 17.True or false: a tiny 20 px button is good button design. (a) False (b) True
18. 18.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.Which colour pair is easy to read? (a) dark blue on black (b) black on yellow (c) yellow on white (d) light grey on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 44 px tall
    Back button: 52 px tall
    Cancel button: 68 px tall
    Send button: 48 px tall (a) Back (b) Save (c) Send (d) Cancel
21. 21.True or false: strong colour contrast is poor button design. (a) True (b) False
22. 22.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) dark blue on white
23. 23.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Back button: 56 px tall
    Done button: 40 px tall
    Next button: 44 px tall
25. 25.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on white (d) yellow on white
26. 26.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 28 px tall
    Cancel button: 64 px tall (a) Save (b) Cancel (c) Send
30. 30.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Help button: 24 px tall
    Done button: 60 px tall (a) Cancel (b) Done (c) Help
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
33. 33.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
34. 34.True or false: a clear word like Save is poor button design. (a) False (b) True
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Cancel button: 48 px tall
    Back button: 64 px tall
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 28 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 px tall. How many px taller must it be?
38. 38.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) yellow on white (d) dark blue on black
39. 39.True or false: icons with no meaning is good button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?

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