App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 366 · 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. How many of these buttons follow the rule?
   Next button: 52 px tall
   Help button: 36 px tall
   Cancel button: 32 px tall
2. 2.True or false: icons with no meaning is poor button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
4. 4.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
5. 5.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: a big, easy tap area is good button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
8. 8.True or false: a tiny 20 px button is good button design. (a) True (b) False
9. 9.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 48 px tall
    Done button: 40 px tall
    Save button: 40 px tall
    Back button: 32 px tall
12. 12.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
14. 14.Which colour pair is hard to read? (a) dark blue on black (b) black on pale grey (c) dark blue on white (d) white on dark green
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 36 px tall
    Send button: 60 px tall
    Next button: 68 px tall
    Back button: 60 px tall (a) Back (b) Next (c) Send (d) Done
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
17. 17.True or false: buttons almost touching is good button design. (a) False (b) True
18. 18.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) red on green (d) black on yellow
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Save button is 36 px tall. How many px taller must it be?
20. 20.True or false: a clear word like Save is good button design. (a) False (b) True
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Send button: 64 px tall
    Done button: 64 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
23. 23.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.True or false: icons with no meaning is good button design. (a) True (b) False
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 36 px tall
    Help button: 40 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Start button: 48 px tall
    Back button: 40 px tall (a) Next (b) Back (c) Start
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Save button: 28 px tall
    Send button: 60 px tall (a) Save (b) Next (c) Send
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 28 px tall
    Start button: 48 px tall
    Next button: 48 px tall (a) Done (b) Start (c) Next
29. 29.True or false: buttons almost touching is poor button design. (a) False (b) True
30. 30.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
31. 31.Which colour pair is easy to read? (a) light grey on white (b) white on dark green (c) red on green (d) dark blue on black
32. 32.True or false: strong colour contrast is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 52 px tall
    Start button: 64 px tall
    Save button: 56 px tall
    Back button: 64 px tall
34. 34.🌗 Is light grey on white 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: 72 px tall
    Next button: 72 px tall
    Cancel button: 36 px tall (a) Next (b) Cancel (c) Help
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Done button: 44 px tall
    Cancel button: 44 px tall
    Save button: 40 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
38. 38.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Send button: 68 px tall
    Save button: 24 px tall
    Back button: 60 px tall (a) Save (b) Help (c) Send (d) Back

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