App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 48 · 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?
   Done button: 48 px tall
   Cancel button: 44 px tall
   Start button: 44 px tall
   Next button: 32 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 32 px tall
   Cancel button: 52 px tall
   Help button: 60 px tall
3. 3.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
4. 4.True or false: a clear word like Save is poor button design. (a) False (b) True
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
6. 6.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on dark green (d) dark blue on black
7. 7.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 44 px tall
   Cancel button: 56 px tall
   Help button: 56 px tall
9. 9.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on dark green (d) white on black
10. 10.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) black on pale grey (d) light grey on white
11. 11.True or false: a clear word like Save is good button design. (a) False (b) True
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Save button: 48 px tall
    Cancel button: 36 px tall
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 52 px tall
    Help button: 56 px tall
    Done button: 48 px tall
14. 14.True or false: strong colour contrast is poor button design. (a) True (b) False
15. 15.Which colour pair is hard to read? (a) yellow on white (b) white on black (c) dark blue on white (d) black on yellow
16. 16.True or false: a tiny 20 px button is good button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
18. 18.True or false: grey text on grey is poor button design. (a) False (b) True
19. 19.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
20. 20.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
21. 21.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 40 px tall
    Help button: 60 px tall
    Save button: 60 px tall (a) Cancel (b) Save (c) Help
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Save button: 60 px tall
    Cancel button: 56 px tall
    Done button: 40 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Start button: 64 px tall
    Done button: 60 px tall (a) Start (b) Done (c) Save
24. 24.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.True or false: a big, easy tap area is good button design. (a) False (b) True
26. 26.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Cancel button: 36 px tall
    Next button: 72 px tall (a) Cancel (b) Next (c) Send
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. The Back button is 32 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Back button: 40 px tall
    Help button: 60 px tall
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Done button: 44 px tall
    Send button: 52 px tall
32. 32.🌗 Is white on black 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) poor design (b) good design
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Save button is 20 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Save button: 48 px tall
    Help button: 64 px tall (a) Save (b) Help (c) Start
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
38. 38.True or false: buttons almost touching is good button design. (a) False (b) True
39. 39.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?

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