App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 318 · 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?
   Cancel button: 64 px tall
   Save button: 64 px tall
   Next button: 36 px tall
   Send button: 48 px tall
2. 2.Which colour pair is easy to read? (a) yellow on white (b) light grey on white (c) dark blue on black (d) black on pale grey
3. 3.True or false: buttons almost touching is good button design. (a) True (b) False
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Done button is 36 px tall. How many px taller must it be?
5. 5.True or false: icons with no meaning is good button design. (a) True (b) False
6. 6.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: strong colour contrast is good button design. (a) False (b) True
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 28 px tall
   Help button: 56 px tall
   Cancel button: 64 px tall (a) Cancel (b) Help (c) Send
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
10. 10.True or false: a clear word like Save is poor button design. (a) False (b) True
11. 11.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 60 px tall
    Next button: 32 px tall
    Back button: 48 px tall (a) Back (b) Start (c) Next
13. 13.True or false: a tiny 20 px button is good button design. (a) True (b) False
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 60 px tall
    Cancel button: 44 px tall
    Next button: 48 px tall (a) Next (b) Cancel (c) Save
15. 15.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
19. 19.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Back button: 32 px tall
    Cancel button: 60 px tall
20. 20.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Save button: 72 px tall
    Back button: 52 px tall (a) Save (b) Back (c) Help
21. 21.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
22. 22.True or false: strong colour contrast is poor 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?
    Next button: 64 px tall
    Cancel button: 32 px tall
    Send button: 48 px tall
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 32 px tall
    Save button: 44 px tall
    Next button: 60 px tall
25. 25.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
26. 26.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Next button: 36 px tall
    Done button: 60 px tall
28. 28.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
29. 29.True or false: a big, easy tap area is good button design. (a) False (b) True
30. 30.True or false: icons with no meaning is poor button design. (a) False (b) True
31. 31.True or false: space between buttons is poor button design. (a) True (b) False
32. 32.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.Which colour pair is hard to read? (a) white on black (b) white on dark green (c) black on yellow (d) light grey on white
34. 34.🌗 Is dark blue on black easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Back button: 28 px tall
    Help button: 52 px tall
    Done button: 52 px tall (a) Done (b) Save (c) Help (d) Back
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 72 px tall
    Help button: 72 px tall
    Save button: 36 px tall (a) Back (b) Save (c) Help
37. 37.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
38. 38.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
39. 39.Which colour pair is hard to read? (a) black on yellow (b) red on green (c) white on dark green (d) black on pale grey
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?

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