App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 485 · 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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Next button: 60 px tall
   Done button: 44 px tall
   Start button: 64 px tall
2. 2.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Back button: 56 px tall
   Cancel button: 36 px tall
   Start button: 52 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
8. 8.Which colour pair is easy to read? (a) red on green (b) black on pale grey (c) yellow on white (d) dark blue on black
9. 9.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
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: 56 px tall
    Back button: 36 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 40 px tall. How many px taller must it be?
13. 13.Which colour pair is easy to read? (a) red on green (b) light grey on white (c) dark blue on black (d) white on black
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Send button: 56 px tall
    Cancel button: 24 px tall (a) Start (b) Send (c) Cancel
15. 15.True or false: space between buttons is poor button design. (a) True (b) False
16. 16.🌗 Is black on pale grey 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?
    Save button: 68 px tall
    Back button: 72 px tall
    Start button: 44 px tall (a) Save (b) Back (c) Start
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
19. 19.True or false: a clear word like Save is good button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Next button: 56 px tall
    Send button: 60 px tall
    Start button: 28 px tall (a) Cancel (b) Next (c) Send (d) Start
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Cancel button: 48 px tall
    Next button: 32 px tall
    Done button: 52 px tall
23. 23.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
24. 24.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
25. 25.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
26. 26.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) light grey on white (d) white on dark green
27. 27.True or false: icons with no meaning is good button design. (a) True (b) False
28. 28.True or false: a clear word like Save is poor button design. (a) False (b) True
29. 29.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
31. 31.Which colour pair is hard to read? (a) white on dark green (b) yellow on white (c) black on yellow (d) dark blue on white
32. 32.True or false: strong colour contrast is poor button design. (a) False (b) True
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 48 px tall
    Save button: 56 px tall
    Send button: 24 px tall (a) Save (b) Cancel (c) Send
35. 35.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on yellow (d) red on green
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Next button: 64 px tall
    Back button: 40 px tall
37. 37.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Back button: 36 px tall
    Save button: 56 px tall
39. 39.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 36 px tall
    Next button: 52 px tall
    Start button: 48 px tall
    Help button: 64 px tall (a) Help (b) Save (c) Start (d) Next
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read

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