App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 514 · 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?
   Send button: 48 px tall
   Help button: 40 px tall
   Done button: 36 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
4. 4.True or false: space between buttons is poor button design. (a) False (b) True
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: strong colour contrast is poor button design. (a) True (b) False
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 48 px tall
   Send button: 36 px tall
   Help button: 48 px tall
   Cancel button: 44 px tall
8. 8.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
10. 10.Which colour pair is easy to read? (a) white on black (b) light grey on white (c) red on green (d) yellow on white
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Send button is 28 px tall. How many px taller must it be?
12. 12.Which colour pair is easy to read? (a) white on dark green (b) pale pink on white (c) red on green (d) dark blue on black
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 48 px tall
    Next button: 44 px tall
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Back button: 40 px tall
    Save button: 32 px tall
    Start button: 44 px tall
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 68 px tall
    Send button: 36 px tall
    Next button: 60 px tall
    Back button: 72 px tall (a) Next (b) Send (c) Save (d) Back
16. 16.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
17. 17.True or false: a big, easy tap area is poor button design. (a) False (b) True
18. 18.True or false: a big, easy tap area is good button design. (a) True (b) False
19. 19.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Cancel button: 48 px tall
    Next button: 36 px tall
    Back button: 52 px tall (a) Next (b) Save (c) Back (d) Cancel
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Done button: 44 px tall
    Cancel button: 36 px tall
    Help button: 60 px tall
22. 22.Which colour pair is hard to read? (a) yellow on white (b) white on dark green (c) white on black (d) black on yellow
23. 23.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Cancel button: 44 px tall
    Back button: 56 px tall (a) Back (b) Help (c) Cancel
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 40 px tall
    Cancel button: 64 px tall
    Start button: 52 px tall
    Back button: 64 px tall (a) Back (b) Save (c) Start (d) Cancel
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 40 px tall
    Help button: 68 px tall
    Back button: 68 px tall (a) Next (b) Back (c) Help
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
29. 29.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 72 px tall
    Next button: 52 px tall
    Cancel button: 72 px tall
    Start button: 24 px tall (a) Start (b) Cancel (c) Help (d) Next
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 36 px tall
    Done button: 56 px tall
    Save button: 56 px tall
33. 33.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
35. 35.True or false: buttons almost touching is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
37. 37.True or false: grey text on grey is good button design. (a) True (b) False
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 64 px tall
    Cancel button: 48 px tall
    Save button: 32 px tall
    Done button: 64 px tall
39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
40. 40.True or false: strong colour contrast is good button design. (a) False (b) True

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