App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 644 · 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: space between buttons? (a) poor design (b) good design
2. 2.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
3. 3.True or false: space between buttons is poor button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 60 px tall
   Start button: 52 px tall
   Next button: 56 px tall
5. 5.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Help button: 72 px tall
   Next button: 32 px tall
   Save button: 68 px tall
   Send button: 52 px tall (a) Next (b) Send (c) Help (d) Save
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 64 px tall
   Help button: 44 px tall
   Next button: 52 px tall (a) Help (b) Next (c) Done
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Cancel button: 32 px tall
   Help button: 36 px tall
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Help button: 24 px tall
    Cancel button: 48 px tall (a) Start (b) Help (c) Cancel
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 36 px tall
    Send button: 48 px tall
    Save button: 56 px tall
    Back button: 60 px tall (a) Save (b) Back (c) Send (d) Next
12. 12.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
13. 13.True or false: a big, easy tap area is poor button design. (a) True (b) False
14. 14.True or false: grey text on grey is poor button design. (a) True (b) False
15. 15.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Done button: 32 px tall
    Next button: 48 px tall (a) Cancel (b) Done (c) Next
17. 17.Which colour pair is hard to read? (a) white on black (b) black on pale grey (c) pale pink on white (d) dark blue on white
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 36 px tall
    Save button: 40 px tall
    Help button: 36 px tall
    Back button: 36 px tall
19. 19.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
20. 20.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) black on pale grey (d) yellow on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Send button: 52 px tall
    Save button: 48 px tall
    Next button: 44 px tall
23. 23.True or false: buttons almost touching is poor button design. (a) False (b) True
24. 24.Which colour pair is easy to read? (a) red on green (b) yellow on white (c) dark blue on white (d) dark blue on black
25. 25.True or false: a big, easy tap area is good button design. (a) True (b) False
26. 26.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is easy to read? (a) pale pink on white (b) black on pale grey (c) yellow on white (d) light grey on white
28. 28.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Back button: 28 px tall
    Help button: 52 px tall (a) Back (b) Help (c) Send
30. 30.Which colour pair is hard to read? (a) dark blue on white (b) white on black (c) black on yellow (d) dark blue on black
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Send button: 28 px tall
    Next button: 56 px tall (a) Next (b) Send (c) Cancel
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 48 px tall
    Help button: 40 px tall
    Cancel button: 52 px tall
33. 33.True or false: a tiny 20 px button is good button design. (a) True (b) False
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Start button: 48 px tall
    Done button: 32 px tall
    Cancel button: 68 px tall (a) Cancel (b) Start (c) Save (d) Done
37. 37.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
39. 39.True or false: strong colour contrast is poor button design. (a) True (b) False
40. 40.True or false: strong colour contrast is good button design. (a) True (b) False

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