App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 176 · 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?
   Next button: 52 px tall
   Send button: 52 px tall
   Save button: 32 px tall
   Back button: 48 px tall (a) Send (b) Save (c) Back (d) Next
2. 2.True or false: space between buttons is poor button design. (a) True (b) False
3. 3.True or false: icons with no meaning is good button design. (a) False (b) True
4. 4.True or false: a clear word like Save is good button design. (a) True (b) False
5. 5.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) dark blue on black (d) white on black
6. 6.True or false: a clear word like Save is poor button design. (a) True (b) False
7. 7.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 52 px tall
   Save button: 48 px tall
   Done button: 44 px tall
   Back button: 64 px tall (a) Save (b) Next (c) Done (d) Back
9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
13. 13.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) dark blue on black (d) yellow on white
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Send button: 44 px tall
    Save button: 60 px tall (a) Send (b) Cancel (c) Save
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Back button: 48 px tall
    Start button: 36 px tall
    Next button: 44 px tall
16. 16.🌗 Is red on green 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 Start button is 20 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 56 px tall
    Cancel button: 36 px tall
    Start button: 68 px tall
    Save button: 52 px tall (a) Save (b) Done (c) Cancel (d) Start
19. 19.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Done button: 36 px tall
    Back button: 52 px tall
21. 21.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
22. 22.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 72 px tall
    Start button: 24 px tall (a) Done (b) Next (c) Start
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Start button is 28 px tall. How many px taller must it be?
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Done button: 64 px tall
    Send button: 56 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 48 px tall
    Save button: 60 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 48 px tall
    Help button: 28 px tall (a) Send (b) Save (c) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
30. 30.Which colour pair is easy to read? (a) yellow on white (b) red on green (c) dark blue on white (d) pale pink on white
31. 31.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
32. 32.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) white on dark green (d) yellow on white
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 60 px tall
    Save button: 32 px tall
    Done button: 32 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Cancel button: 68 px tall
    Next button: 36 px tall (a) Send (b) Next (c) Cancel
38. 38.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Save button: 40 px tall
    Start button: 52 px tall
40. 40.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read

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