App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 447 · 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.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
2. 2.True or false: a big, easy tap area is good button design. (a) False (b) True
3. 3.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Help button: 36 px tall
   Done button: 48 px tall
   Next button: 64 px tall
   Save button: 36 px tall
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Save button is 44 px tall. How many px taller must it be?
5. 5.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 32 px tall
   Done button: 48 px tall
   Save button: 44 px tall
6. 6.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
7. 7.True or false: grey text on grey is poor button design. (a) True (b) False
8. 8.Which colour pair is easy to read? (a) light grey on white (b) red on green (c) pale pink on white (d) dark blue on white
9. 9.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
10. 10.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
11. 11.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
12. 12.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 32 px tall
    Save button: 40 px tall
    Done button: 44 px tall
13. 13.True or false: a clear word like Save is good button design. (a) False (b) True
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 32 px tall
    Send button: 48 px tall
    Done button: 36 px tall
15. 15.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
17. 17.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
19. 19.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
21. 21.Which colour pair is hard to read? (a) black on pale grey (b) red on green (c) black on yellow (d) white on black
22. 22.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
23. 23.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Back button: 36 px tall
    Start button: 56 px tall (a) Save (b) Start (c) Back
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Back button: 56 px tall
    Save button: 56 px tall
    Cancel button: 48 px tall
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 36 px tall
    Send button: 64 px tall
    Done button: 44 px tall
27. 27.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 28 px tall
    Cancel button: 60 px tall
    Back button: 68 px tall (a) Cancel (b) Back (c) Help
28. 28.True or false: a tiny 20 px button is good button design. (a) True (b) False
29. 29.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 48 px tall
    Next button: 72 px tall
    Back button: 24 px tall (a) Help (b) Back (c) Next
30. 30.Which colour pair is hard to read? (a) black on pale grey (b) dark blue on white (c) black on yellow (d) pale pink on white
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Next button is 36 px tall. How many px taller must it be?
32. 32.True or false: a big, easy tap area is poor button design. (a) True (b) False
33. 33.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 40 px tall
    Back button: 32 px tall
    Done button: 40 px tall
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
35. 35.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Next button: 48 px tall
    Start button: 28 px tall
    Send button: 72 px tall (a) Start (b) Next (c) Cancel (d) Send
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Done button: 32 px tall
    Save button: 52 px tall
37. 37.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
38. 38.Which colour pair is easy to read? (a) red on green (b) dark blue on black (c) yellow on white (d) white on black
39. 39.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
40. 40.True or false: buttons almost touching is poor button design. (a) True (b) False

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