App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 404 · 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?
   Start button: 60 px tall
   Next button: 60 px tall
   Back button: 36 px tall
   Cancel button: 44 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
3. 3.Which colour pair is easy to read? (a) dark blue on black (b) light grey on white (c) yellow on white (d) black on yellow
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 28 px tall. How many px taller must it be?
5. 5.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Start button: 52 px tall
   Back button: 28 px tall
   Help button: 72 px tall (a) Start (b) Back (c) Help
7. 7.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) white on dark green (d) pale pink on white
8. 8.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 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?
   Help button: 64 px tall
   Done button: 48 px tall
   Send button: 24 px tall (a) Done (b) Help (c) Send
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.🔘 Our rule: buttons are at least 48 px tall. The Done button is 24 px tall. How many px taller must it be?
12. 12.Which colour pair is easy to read? (a) dark blue on white (b) yellow on white (c) red on green (d) pale pink on white
13. 13.🔘 Is this good or poor button design: space between buttons? (a) poor design (b) good design
14. 14.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
15. 15.Which colour pair is hard to read? (a) white on dark green (b) black on yellow (c) dark blue on black (d) dark blue on white
16. 16.True or false: icons with no meaning is poor button design. (a) True (b) False
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 28 px tall
    Send button: 72 px tall
    Cancel button: 72 px tall
    Next button: 68 px tall (a) Save (b) Next (c) Cancel (d) Send
18. 18.True or false: icons with no meaning is good button design. (a) True (b) False
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 60 px tall
    Save button: 40 px tall
    Back button: 40 px tall
20. 20.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
21. 21.True or false: a clear word like Save is good button design. (a) False (b) True
22. 22.True or false: a clear word like Save is poor button design. (a) False (b) True
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
24. 24.Which colour pair is hard to read? (a) black on yellow (b) black on pale grey (c) yellow on white (d) dark blue on white
25. 25.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 24 px tall
    Next button: 48 px tall
    Back button: 56 px tall (a) Back (b) Next (c) Send
26. 26.True or false: a big, easy tap area is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Back button is 28 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?
    Start button: 52 px tall
    Next button: 52 px tall
    Help button: 24 px tall
    Done button: 48 px tall (a) Start (b) Next (c) Done (d) Help
29. 29.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
31. 31.🌗 Is yellow on white easy or hard to read on a button? (a) hard to read (b) easy to read
32. 32.True or false: grey text on grey is good button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 44 px tall
    Done button: 64 px tall
    Back button: 52 px tall
    Save button: 68 px tall (a) Done (b) Back (c) Save (d) Cancel
34. 34.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 64 px tall
    Help button: 48 px tall
    Done button: 64 px tall
36. 36.🌗 Is white on black 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?
    Back button: 44 px tall
    Cancel button: 64 px tall
    Start button: 68 px tall
    Save button: 52 px tall (a) Save (b) Back (c) Cancel (d) Start
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Next button is 32 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?

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