App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 189 · 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?
   Back button: 48 px tall
   Send button: 60 px tall
   Cancel button: 40 px tall
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 60 px tall
   Done button: 56 px tall
   Next button: 32 px tall
3. 3.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
4. 4.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
5. 5.True or false: space between buttons is poor button design. (a) True (b) False
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Start button is 44 px tall. How many px taller must it be?
7. 7.True or false: space between buttons is good button design. (a) False (b) True
8. 8.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
9. 9.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
10. 10.Which colour pair is hard to read? (a) white on black (b) black on yellow (c) yellow on white (d) black on pale grey
11. 11.True or false: grey text on grey is poor button design. (a) False (b) True
12. 12.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) white on dark green (d) yellow on white
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 20 px tall. How many px taller must it be?
14. 14.True or false: a tiny 20 px button is poor button design. (a) False (b) True
15. 15.🔘 Our rule: buttons are at least 48 px tall. The Send button is 32 px tall. How many px taller must it be?
16. 16.True or false: buttons almost touching is good button design. (a) False (b) True
17. 17.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 32 px tall
    Help button: 56 px tall
    Save button: 48 px tall (a) Back (b) Save (c) Help
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Next button is 20 px tall. How many px taller must it be?
20. 20.Which colour pair is easy to read? (a) light grey on white (b) yellow on white (c) pale pink on white (d) dark blue on white
21. 21.True or false: strong colour contrast is poor button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 44 px tall
    Help button: 64 px tall
    Done button: 32 px tall
23. 23.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 36 px tall
    Next button: 32 px tall
    Back button: 36 px tall
24. 24.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
26. 26.Which colour pair is hard to read? (a) black on yellow (b) dark blue on white (c) white on black (d) red on green
27. 27.🔘 Is this good or poor button design: icons with no meaning? (a) good design (b) poor design
28. 28.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 64 px tall
    Save button: 32 px tall
    Help button: 40 px tall
    Done button: 36 px tall
29. 29.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) white on black (d) light grey on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 52 px tall
    Cancel button: 52 px tall
    Send button: 60 px tall
    Help button: 32 px tall (a) Send (b) Back (c) Help (d) Cancel
31. 31.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
32. 32.🌗 Is pale pink on white easy or hard to read on a button? (a) easy to read (b) hard to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 68 px tall
    Help button: 56 px tall
    Save button: 44 px tall (a) Help (b) Send (c) Save
34. 34.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 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: 64 px tall
    Start button: 40 px tall
    Save button: 52 px tall (a) Save (b) Start (c) Cancel
36. 36.True or false: icons with no meaning is good button design. (a) True (b) False
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 68 px tall
    Start button: 72 px tall
    Next button: 32 px tall (a) Start (b) Next (c) Cancel
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 52 px tall
    Done button: 60 px tall
    Next button: 28 px tall (a) Next (b) Done (c) Cancel
39. 39.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
40. 40.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design

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