App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 305 · 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.True or false: a clear word like Save is poor button design. (a) False (b) True
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
4. 4.Which colour pair is easy to read? (a) dark blue on black (b) pale pink on white (c) black on yellow (d) yellow on white
5. 5.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 60 px tall
   Next button: 40 px tall
   Back button: 64 px tall
   Done button: 40 px tall
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.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
9. 9.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
10. 10.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) white on dark green (d) light grey on white
11. 11.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
12. 12.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) black on pale grey (d) light grey on white
14. 14.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Done button: 64 px tall
    Back button: 32 px tall
17. 17.True or false: a big, easy tap area is poor button design. (a) True (b) False
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 68 px tall
    Save button: 60 px tall
    Cancel button: 40 px tall (a) Save (b) Start (c) Cancel
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Back button: 64 px tall
    Help button: 24 px tall (a) Back (b) Save (c) Help
20. 20.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 32 px tall
    Start button: 32 px tall
    Cancel button: 60 px tall
    Save button: 52 px tall
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 28 px tall
    Next button: 48 px tall
    Send button: 72 px tall (a) Next (b) Send (c) Start
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Next button: 48 px tall
    Start button: 64 px tall
    Back button: 44 px tall (a) Start (b) Back (c) Next (d) Done
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 60 px tall
    Back button: 24 px tall
    Start button: 64 px tall (a) Back (b) Send (c) Start
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Back button: 44 px tall
    Done button: 52 px tall
26. 26.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is hard to read? (a) white on black (b) dark blue on white (c) black on pale grey (d) pale pink on white
28. 28.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
29. 29.True or false: grey text on grey is poor button design. (a) True (b) False
30. 30.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.Which colour pair is easy to read? (a) white on dark green (b) red on green (c) yellow on white (d) light grey on white
32. 32.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 64 px tall
    Back button: 52 px tall
    Cancel button: 64 px tall
    Next button: 56 px tall
33. 33.True or false: a clear word like Save is good button design. (a) False (b) True
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Done button: 68 px tall
    Start button: 28 px tall (a) Next (b) Done (c) Start
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Back button: 68 px tall
    Next button: 36 px tall (a) Help (b) Back (c) Next
36. 36.True or false: buttons almost touching is poor button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 64 px tall
    Send button: 32 px tall
    Done button: 36 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 36 px tall
    Send button: 60 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 44 px tall
    Next button: 48 px tall
    Back button: 36 px tall
    Send button: 48 px tall
40. 40.Which colour pair is easy to read? (a) yellow on white (b) dark blue on white (c) light grey on white (d) pale pink on white

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