App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 316 · 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: space between buttons? (a) poor design (b) good design
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Done button is 20 px tall. How many px taller must it be?
3. 3.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
4. 4.Which colour pair is easy to read? (a) yellow on white (b) dark blue on black (c) white on dark green (d) pale pink on white
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
6. 6.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
7. 7.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Cancel button: 52 px tall
   Done button: 44 px tall
   Start button: 64 px tall
8. 8.Which colour pair is hard to read? (a) light grey on white (b) white on black (c) black on yellow (d) dark blue on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
10. 10.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 56 px tall
    Help button: 32 px tall
    Send button: 64 px tall
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
13. 13.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Help button: 44 px tall
    Done button: 52 px tall
14. 14.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
15. 15.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 32 px tall
    Cancel button: 40 px tall
    Help button: 64 px tall
    Send button: 64 px tall
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
17. 17.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on black (d) black on pale grey
18. 18.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) white on black (d) pale pink on white
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 44 px tall. How many px taller must it be?
20. 20.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
22. 22.True or false: buttons almost touching is good button design. (a) True (b) False
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 52 px tall
    Send button: 56 px tall
    Next button: 60 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Done button: 64 px tall
    Send button: 36 px tall
    Cancel button: 60 px tall (a) Cancel (b) Done (c) Send (d) Next
25. 25.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
27. 27.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) yellow on white (d) pale pink on white
28. 28.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 24 px tall
    Done button: 48 px tall
    Start button: 56 px tall (a) Done (b) Start (c) Next
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 52 px tall
    Cancel button: 36 px tall
    Help button: 72 px tall (a) Start (b) Cancel (c) Help
32. 32.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
33. 33.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 40 px tall
    Cancel button: 32 px tall
    Save button: 64 px tall
35. 35.True or false: a big, easy tap area is poor button design. (a) True (b) False
36. 36.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) dark blue on white (d) white on black
37. 37.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on black (d) white on dark green
38. 38.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
39. 39.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Help button: 48 px tall
    Save button: 60 px tall
    Back button: 48 px tall

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