App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 282 · 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) white on dark green (b) light grey on white (c) pale pink on white (d) red on green
2. 2.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 40 px tall
   Help button: 60 px tall
   Next button: 48 px tall (a) Next (b) Help (c) Done
3. 3.True or false: grey text on grey is good button design. (a) True (b) False
4. 4.True or false: a big, easy tap area is poor button design. (a) True (b) False
5. 5.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
6. 6.🌗 Is red on green 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. Which button is too small?
   Done button: 44 px tall
   Back button: 56 px tall
   Save button: 48 px tall (a) Back (b) Done (c) Save
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
9. 9.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 44 px tall
   Start button: 56 px tall
   Back button: 56 px tall (a) Start (b) Cancel (c) Back
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.True or false: a big, easy tap area is good button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 52 px tall
    Cancel button: 60 px tall
    Done button: 68 px tall
    Start button: 40 px tall (a) Send (b) Cancel (c) Start (d) Done
13. 13.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) dark blue on white (d) dark blue on black
14. 14.True or false: space between buttons is poor button design. (a) False (b) True
15. 15.True or false: a tiny 20 px button is poor button design. (a) True (b) False
16. 16.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 64 px tall
    Cancel button: 68 px tall
    Help button: 28 px tall (a) Next (b) Cancel (c) Help
18. 18.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
19. 19.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
21. 21.True or false: icons with no meaning is good button design. (a) False (b) True
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
24. 24.True or false: a tiny 20 px button is good button design. (a) False (b) True
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 68 px tall
    Back button: 68 px tall
    Cancel button: 28 px tall (a) Back (b) Done (c) Cancel
26. 26.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
27. 27.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
28. 28.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
29. 29.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 24 px tall
    Cancel button: 68 px tall
    Save button: 72 px tall (a) Cancel (b) Save (c) Done
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 64 px tall
    Next button: 64 px tall
    Back button: 44 px tall (a) Back (b) Next (c) Help
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 60 px tall
    Send button: 32 px tall
    Help button: 56 px tall (a) Help (b) Send (c) Back
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Done button: 64 px tall
    Start button: 40 px tall
    Back button: 60 px tall
36. 36.True or false: strong colour contrast is poor button design. (a) True (b) False
37. 37.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on black (c) dark blue on white (d) white on dark green
39. 39.Which colour pair is hard to read? (a) dark blue on white (b) red on green (c) white on dark green (d) black on yellow
40. 40.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) black on yellow (d) white on dark green

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