App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 267 · 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.Which colour pair is easy to read? (a) black on yellow (b) yellow on white (c) light grey on white (d) pale pink on white
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 64 px tall
   Help button: 28 px tall
   Cancel button: 68 px tall
   Save button: 60 px tall (a) Start (b) Save (c) Help (d) Cancel
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Send button is 20 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 36 px tall
   Send button: 48 px tall
   Cancel button: 36 px tall
   Next button: 40 px tall
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
9. 9.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
11. 11.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Start button is 32 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
14. 14.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
16. 16.True or false: a tiny 20 px button is good button design. (a) True (b) False
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
18. 18.True or false: a tiny 20 px button is poor button design. (a) True (b) False
19. 19.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on dark green (d) dark blue on white
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
21. 21.True or false: a big, easy tap area is poor button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Cancel button: 68 px tall
    Save button: 32 px tall
    Help button: 60 px tall (a) Cancel (b) Help (c) Save (d) Done
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 48 px tall
    Help button: 72 px tall
    Done button: 36 px tall (a) Done (b) Send (c) Help
24. 24.🔘 Our rule: buttons are at least 48 px tall. The Back button is 44 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?
    Send button: 40 px tall
    Next button: 40 px tall
    Start button: 44 px tall
    Save button: 32 px tall
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 36 px tall
    Back button: 36 px tall
    Next button: 56 px tall
    Cancel button: 52 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
29. 29.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) black on yellow (d) light grey on white
31. 31.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
32. 32.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.True or false: a big, easy tap area is good button design. (a) False (b) True
34. 34.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
35. 35.True or false: grey text on grey is good button design. (a) False (b) True
36. 36.True or false: buttons almost touching is poor button design. (a) False (b) True
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Back button: 64 px tall
    Start button: 40 px tall
    Done button: 64 px tall
38. 38.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) yellow on white (d) dark blue on black
39. 39.Which colour pair is easy to read? (a) dark blue on white (b) red on green (c) pale pink on white (d) yellow on white
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 28 px tall
    Back button: 52 px tall (a) Back (b) Save (c) Next

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