App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 333 · 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. The Next button is 24 px tall. How many px taller must it be?
2. 2.True or false: a clear word like Save is poor button design. (a) True (b) False
3. 3.True or false: strong colour contrast is good button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 64 px tall
   Done button: 52 px tall
   Send button: 56 px tall
   Cancel button: 28 px tall (a) Help (b) Done (c) Cancel (d) Send
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
6. 6.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 60 px tall
   Cancel button: 24 px tall
   Start button: 64 px tall
   Done button: 48 px tall (a) Start (b) Done (c) Cancel (d) Next
8. 8.True or false: a big, easy tap area is poor button design. (a) True (b) False
9. 9.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.True or false: icons with no meaning is good button design. (a) True (b) False
11. 11.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 40 px tall
    Save button: 60 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Save button: 32 px tall
    Start button: 68 px tall (a) Save (b) Start (c) Send
14. 14.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
16. 16.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
19. 19.True or false: buttons almost touching is good button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 64 px tall
    Cancel button: 44 px tall
    Save button: 64 px tall
21. 21.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
22. 22.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
24. 24.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
25. 25.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) black on yellow (d) white on black
26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Start button: 56 px tall
    Back button: 48 px tall
    Save button: 44 px tall
29. 29.True or false: a clear word like Save is good button design. (a) False (b) True
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Start button: 56 px tall
    Back button: 48 px tall
    Help button: 24 px tall (a) Help (b) Send (c) Start (d) Back
31. 31.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
32. 32.True or false: a tiny 20 px button is good button design. (a) True (b) False
33. 33.True or false: icons with no meaning is poor button design. (a) False (b) True
34. 34.True or false: space between buttons is poor button design. (a) True (b) False
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 44 px tall
    Start button: 72 px tall
    Next button: 60 px tall (a) Next (b) Start (c) Done
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 48 px tall
    Cancel button: 36 px tall
    Back button: 56 px tall (a) Cancel (b) Next (c) Back
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 56 px tall
    Save button: 32 px tall
    Done button: 72 px tall (a) Save (b) Done (c) Next
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 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?
    Next button: 48 px tall
    Save button: 44 px tall
    Done button: 72 px tall
    Send button: 64 px tall (a) Send (b) Save (c) Done (d) Next

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