App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 648 · 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?
   Cancel button: 48 px tall
   Done button: 56 px tall
   Send button: 60 px tall
   Start button: 64 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
3. 3.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) white on dark green (d) pale pink on white
4. 4.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
5. 5.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Back button: 24 px tall
   Done button: 68 px tall
   Next button: 48 px tall (a) Done (b) Back (c) Next
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?
   Back button: 32 px tall
   Next button: 52 px tall
   Send button: 72 px tall
   Start button: 64 px tall (a) Back (b) Start (c) Next (d) Send
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 72 px tall
   Start button: 68 px tall
   Send button: 40 px tall (a) Send (b) Done (c) Start
10. 10.True or false: strong colour contrast is poor button design. (a) True (b) False
11. 11.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.True or false: icons with no meaning is poor button design. (a) True (b) False
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Send button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Start button: 40 px tall
    Back button: 52 px tall
    Save button: 60 px tall (a) Start (b) Next (c) Save (d) Back
15. 15.Which colour pair is easy to read? (a) dark blue on black (b) yellow on white (c) black on yellow (d) pale pink on white
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Start button: 68 px tall
    Next button: 64 px tall (a) Save (b) Next (c) Start
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 28 px tall
    Send button: 48 px tall
    Help button: 60 px tall
    Cancel button: 68 px tall (a) Help (b) Cancel (c) Next (d) Send
18. 18.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
19. 19.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
20. 20.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Help button: 64 px tall
    Save button: 52 px tall (a) Cancel (b) Help (c) Save
22. 22.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Help button: 56 px tall
    Cancel button: 52 px tall (a) Next (b) Help (c) Cancel
24. 24.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
25. 25.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) pale pink on white (d) black on pale grey
26. 26.True or false: a tiny 20 px button is poor button design. (a) True (b) False
27. 27.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
28. 28.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 40 px tall
    Next button: 68 px tall
    Cancel button: 60 px tall (a) Back (b) Next (c) Cancel
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 68 px tall
    Save button: 40 px tall
    Done button: 48 px tall (a) Save (b) Done (c) Next
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 44 px tall
    Start button: 56 px tall
    Next button: 36 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
33. 33.True or false: a big, easy tap area is good button design. (a) False (b) True
34. 34.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on black (d) dark blue on black
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
36. 36.True or false: strong colour contrast is good button design. (a) False (b) True
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Next button: 48 px tall
    Start button: 24 px tall (a) Send (b) Next (c) Start
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Cancel button: 40 px tall
    Done button: 40 px tall
    Next button: 56 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Save button: 56 px tall
    Cancel button: 24 px tall
    Help button: 64 px tall (a) Start (b) Save (c) Help (d) Cancel

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