App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 359 · 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. Which button is too small?
   Next button: 36 px tall
   Start button: 60 px tall
   Cancel button: 56 px tall (a) Start (b) Next (c) Cancel
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 36 px tall
   Back button: 40 px tall
   Cancel button: 48 px tall
   Help button: 56 px tall
3. 3.True or false: grey text on grey is poor button design. (a) False (b) True
4. 4.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
5. 5.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
8. 8.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 64 px tall
   Help button: 64 px tall
   Cancel button: 36 px tall
   Done button: 56 px tall
10. 10.True or false: icons with no meaning is good button design. (a) True (b) False
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 36 px tall
    Next button: 60 px tall
    Done button: 56 px tall
12. 12.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
13. 13.True or false: space between buttons is poor 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?
    Cancel button: 32 px tall
    Done button: 48 px tall
    Back button: 64 px tall
    Send button: 56 px tall
15. 15.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on pale grey (d) black on yellow
16. 16.🔘 Our rule: buttons are at least 48 px tall. The Back button is 24 px tall. How many px taller must it be?
17. 17.Which colour pair is easy to read? (a) light grey on white (b) dark blue on white (c) dark blue on black (d) yellow on white
18. 18.True or false: a tiny 20 px button is poor button design. (a) False (b) True
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 48 px tall
    Save button: 24 px tall
    Back button: 52 px tall (a) Back (b) Save (c) Done
20. 20.Which colour pair is easy to read? (a) pale pink on white (b) white on black (c) dark blue on black (d) yellow on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 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?
    Save button: 56 px tall
    Done button: 64 px tall
    Start button: 52 px tall
23. 23.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
24. 24.Which colour pair is hard to read? (a) black on yellow (b) white on dark green (c) yellow on white (d) dark blue on white
25. 25.🌗 Is red on green easy or hard to read on a button? (a) easy to read (b) hard to read
26. 26.Which colour pair is hard to read? (a) white on dark green (b) pale pink on white (c) black on yellow (d) dark blue on white
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 56 px tall
    Next button: 32 px tall
    Back button: 52 px tall
28. 28.Which colour pair is easy to read? (a) dark blue on black (b) red on green (c) black on yellow (d) yellow on white
29. 29.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
30. 30.True or false: a clear word like Save is poor button design. (a) True (b) False
31. 31.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 36 px tall
    Send button: 60 px tall
    Cancel button: 68 px tall (a) Help (b) Send (c) Cancel
33. 33.True or false: icons with no meaning is poor button design. (a) False (b) True
34. 34.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
35. 35.True or false: a big, easy tap area is good button design. (a) False (b) True
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Send button: 48 px tall
    Back button: 32 px tall
    Done button: 64 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Send button: 64 px tall
    Help button: 56 px tall
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Cancel button: 32 px tall
    Next button: 48 px tall (a) Back (b) Next (c) Cancel
39. 39.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 28 px tall
    Back button: 52 px tall
    Done button: 52 px tall (a) Back (b) Done (c) Cancel

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