App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 544 · 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 this good or poor button design: a big, easy tap area? (a) poor design (b) good design
2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
4. 4.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.True or false: icons with no meaning is poor button design. (a) False (b) True
7. 7.True or false: a big, easy tap area is good button design. (a) True (b) False
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 60 px tall
   Start button: 48 px tall
   Done button: 36 px tall (a) Back (b) Done (c) Start
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 40 px tall
    Next button: 56 px tall
    Back button: 56 px tall
    Done button: 56 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Send button: 24 px tall
    Save button: 68 px tall (a) Save (b) Send (c) Done
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
14. 14.True or false: grey text on grey is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Send button: 56 px tall
    Start button: 32 px tall
    Back button: 36 px tall
16. 16.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 36 px tall
    Next button: 64 px tall
    Done button: 44 px tall
19. 19.True or false: space between buttons is poor button design. (a) True (b) False
20. 20.Which colour pair is hard to read? (a) white on black (b) pale pink on white (c) white on dark green (d) black on yellow
21. 21.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: buttons almost touching is poor button design. (a) False (b) True
23. 23.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Next button: 32 px tall
    Save button: 48 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Save button: 56 px tall
    Help button: 64 px tall
27. 27.True or false: a tiny 20 px button is poor button design. (a) False (b) True
28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Done button: 64 px tall
    Send button: 48 px tall
    Cancel button: 44 px tall (a) Done (b) Save (c) Send (d) Cancel
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 60 px tall
    Cancel button: 60 px tall
    Save button: 64 px tall
    Next button: 60 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Cancel button: 36 px tall
    Start button: 68 px tall
    Next button: 48 px tall (a) Start (b) Cancel (c) Send (d) Next
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 40 px tall
    Back button: 60 px tall
    Cancel button: 68 px tall
    Save button: 64 px tall (a) Save (b) Cancel (c) Send (d) Back
34. 34.True or false: strong colour contrast is poor button design. (a) False (b) True
35. 35.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) light grey on white (d) red on green
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 56 px tall
    Help button: 64 px tall
    Send button: 48 px tall
    Back button: 32 px tall (a) Back (b) Cancel (c) Help (d) Send
37. 37.True or false: grey text on grey is poor button design. (a) True (b) False
38. 38.🌗 Is black on yellow 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. Which button is too small?
    Cancel button: 44 px tall
    Save button: 48 px tall
    Send button: 64 px tall (a) Send (b) Save (c) Cancel
40. 40.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on dark green (d) light grey on white

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