App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 102 · 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 big, easy tap area? (a) good design (b) poor design
2. 2.🌗 Is light grey on white easy or hard to read on a button? (a) hard to read (b) easy to read
3. 3.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
4. 4.Which colour pair is easy to read? (a) dark blue on white (b) red on green (c) light grey on white (d) dark blue on black
5. 5.🌗 Is red on green easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.True or false: strong colour contrast is good button design. (a) False (b) True
7. 7.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
8. 8.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Cancel button: 52 px tall
   Done button: 60 px tall
   Next button: 64 px tall
   Back button: 40 px tall
9. 9.True or false: space between buttons is poor button design. (a) True (b) False
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Done button: 68 px tall
    Cancel button: 56 px tall
    Send button: 48 px tall (a) Send (b) Done (c) Back (d) Cancel
11. 11.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 64 px tall
    Save button: 28 px tall
    Back button: 60 px tall (a) Send (b) Back (c) Save
12. 12.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
13. 13.True or false: a tiny 20 px button is good button design. (a) True (b) False
14. 14.Which colour pair is easy to read? (a) red on green (b) white on black (c) light grey on white (d) yellow on white
15. 15.Which colour pair is hard to read? (a) white on dark green (b) black on pale grey (c) dark blue on black (d) dark blue on white
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 56 px tall
    Send button: 60 px tall
    Save button: 60 px tall
    Next button: 40 px tall
17. 17.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 48 px tall
    Start button: 40 px tall
    Next button: 64 px tall
18. 18.True or false: space between buttons is good button design. (a) True (b) False
19. 19.True or false: icons with no meaning is good button design. (a) True (b) False
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 40 px tall. How many px taller must it be?
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 60 px tall
    Next button: 36 px tall
    Send button: 60 px tall
    Help button: 64 px tall
22. 22.True or false: buttons almost touching 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?
    Back button: 32 px tall
    Done button: 40 px tall
    Save button: 40 px tall
    Send button: 44 px tall
24. 24.Which colour pair is hard to read? (a) red on green (b) white on dark green (c) black on yellow (d) black on pale grey
25. 25.True or false: grey text on grey is good button design. (a) False (b) True
26. 26.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 56 px tall
    Send button: 60 px tall
    Save button: 64 px tall
    Start button: 60 px tall
27. 27.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) light grey on white (d) black on pale grey
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 64 px tall
    Done button: 56 px tall
    Cancel button: 36 px tall
    Help button: 68 px tall (a) Done (b) Help (c) Cancel (d) Start
29. 29.Which colour pair is hard to read? (a) yellow on white (b) black on yellow (c) white on dark green (d) white on black
30. 30.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
32. 32.🔘 Is this good or poor button design: a tiny 20 px button? (a) poor design (b) good design
33. 33.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
34. 34.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.True or false: a big, easy tap area is good button design. (a) True (b) False
36. 36.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 36 px tall
    Start button: 52 px tall
    Back button: 64 px tall (a) Start (b) Send (c) Back
37. 37.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
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.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 36 px tall
    Save button: 32 px tall
    Cancel button: 64 px tall
40. 40.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Back button: 52 px tall
    Start button: 24 px tall
    Next button: 64 px tall (a) Next (b) Start (c) Send (d) Back

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