App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 308 · 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: a tiny 20 px button? (a) good design (b) poor design
2. 2.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
4. 4.True or false: strong colour contrast is poor button design. (a) True (b) False
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 56 px tall
   Send button: 32 px tall
   Next button: 32 px tall
6. 6.True or false: a big, easy tap area is good button design. (a) False (b) True
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
8. 8.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 40 px tall. How many px taller must it be?
11. 11.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
12. 12.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) dark blue on black (d) white on dark green
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 64 px tall
    Help button: 44 px tall
    Save button: 64 px tall
    Cancel button: 52 px tall
15. 15.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 52 px tall
    Send button: 28 px tall
    Done button: 56 px tall
    Cancel button: 52 px tall (a) Next (b) Send (c) Done (d) Cancel
18. 18.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) black on pale grey (d) yellow on white
20. 20.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
21. 21.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: space between buttons is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 40 px tall
    Help button: 56 px tall
    Send button: 60 px tall
    Save button: 56 px tall (a) Start (b) Send (c) Save (d) Help
24. 24.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
26. 26.Which colour pair is easy to read? (a) black on yellow (b) light grey on white (c) red on green (d) dark blue on black
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Send button: 52 px tall
    Help button: 36 px tall
    Start button: 72 px tall (a) Save (b) Start (c) Help (d) Send
29. 29.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: a clear word like Save is poor button design. (a) True (b) False
31. 31.True or false: a big, easy tap area is poor button design. (a) True (b) False
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 72 px tall
    Help button: 28 px tall (a) Save (b) Help (c) Send
33. 33.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
34. 34.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
35. 35.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 44 px tall
    Save button: 56 px tall
    Back button: 48 px tall
    Done button: 52 px tall (a) Back (b) Save (c) Help (d) Done
37. 37.True or false: grey text on grey is good button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 32 px tall
    Done button: 36 px tall
    Help button: 56 px tall
    Back button: 56 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 48 px tall
    Cancel button: 32 px tall
    Save button: 52 px tall
    Start button: 64 px tall
40. 40.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) pale pink on white (d) white on black

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