App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 519 · 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 hard to read? (a) yellow on white (b) white on dark green (c) white on black (d) black on yellow
2. 2.True or false: a big, easy tap area is good button design. (a) False (b) True
3. 3.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
4. 4.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) dark blue on white (d) light grey on white
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Save button is 40 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 44 px tall
   Back button: 60 px tall
   Save button: 56 px tall
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
8. 8.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) pale pink on white (d) black on yellow
9. 9.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 44 px tall
    Save button: 36 px tall
    Next button: 56 px tall
12. 12.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
13. 13.True or false: icons with no meaning is poor button design. (a) True (b) False
14. 14.Which colour pair is easy to read? (a) white on dark green (b) yellow on white (c) red on green (d) dark blue on black
15. 15.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) black on pale grey (d) yellow on white
16. 16.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 56 px tall
    Save button: 60 px tall
    Back button: 40 px tall
    Done button: 72 px tall (a) Back (b) Help (c) Save (d) Done
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 48 px tall
    Start button: 44 px tall
    Save button: 32 px tall
    Back button: 52 px tall
18. 18.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
19. 19.True or false: strong colour contrast is poor button design. (a) False (b) True
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Save button: 40 px tall
    Done button: 60 px tall (a) Save (b) Back (c) Done
21. 21.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) white on dark green (d) dark blue on black
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 64 px tall
    Start button: 52 px tall
    Save button: 48 px tall
23. 23.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
24. 24.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
25. 25.True or false: a big, easy tap area is poor button design. (a) False (b) True
26. 26.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
27. 27.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 24 px tall
    Help button: 72 px tall
    Send button: 52 px tall
    Done button: 52 px tall (a) Done (b) Help (c) Back (d) Send
29. 29.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) white on black (d) red on green
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Next button: 72 px tall
    Cancel button: 68 px tall
    Send button: 24 px tall (a) Next (b) Start (c) Send (d) Cancel
33. 33.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
34. 34.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Send button: 64 px tall
    Next button: 40 px tall
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Back button is 32 px tall. How many px taller must it be?
36. 36.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 32 px tall
    Next button: 56 px tall
    Back button: 64 px tall (a) Next (b) Back (c) Cancel
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Done button: 56 px tall
    Next button: 60 px tall
    Cancel button: 64 px tall (a) Done (b) Cancel (c) Next (d) Help
39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Save button: 28 px tall
    Cancel button: 52 px tall (a) Start (b) Cancel (c) Save

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