App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 329 · 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. The Done button is 20 px tall. How many px taller must it be?
2. 2.True or false: space between buttons is good button design. (a) False (b) True
3. 3.Which colour pair is easy to read? (a) pale pink on white (b) yellow on white (c) white on black (d) red on green
4. 4.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Next button: 48 px tall
   Back button: 64 px tall
   Help button: 40 px tall (a) Help (b) Next (c) Back
5. 5.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) black on yellow (d) pale pink on white
6. 6.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Cancel button: 48 px tall
   Help button: 52 px tall
   Next button: 36 px tall (a) Cancel (b) Help (c) Next
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
8. 8.Which colour pair is hard to read? (a) dark blue on white (b) yellow on white (c) black on pale grey (d) black on yellow
9. 9.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 40 px tall
   Back button: 32 px tall
   Next button: 56 px tall
   Save button: 64 px tall
10. 10.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 48 px tall
    Next button: 52 px tall
    Cancel button: 52 px tall
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 40 px tall
    Help button: 40 px tall
    Cancel button: 32 px tall
    Done button: 40 px tall
12. 12.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
13. 13.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
14. 14.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Cancel button: 44 px tall
    Start button: 64 px tall
15. 15.Which colour pair is hard to read? (a) white on dark green (b) white on black (c) black on pale grey (d) dark blue on black
16. 16.🌗 Is black on yellow easy or hard to read on a button? (a) easy to read (b) hard to read
17. 17.Which colour pair is hard to read? (a) dark blue on white (b) black on pale grey (c) red on green (d) white on black
18. 18.True or false: a clear word like Save is poor button design. (a) False (b) True
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.🔘 Our rule: buttons are at least 48 px tall. The Send button is 44 px tall. How many px taller must it be?
21. 21.True or false: a clear word like Save is good button design. (a) True (b) False
22. 22.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 40 px tall. How many px taller must it be?
23. 23.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
24. 24.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 32 px tall
    Back button: 48 px tall
    Start button: 56 px tall
    Done button: 40 px tall
25. 25.True or false: buttons almost touching is poor button design. (a) True (b) False
26. 26.True or false: a tiny 20 px button is good button design. (a) True (b) False
27. 27.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Help button: 48 px tall
    Next button: 56 px tall
28. 28.True or false: buttons almost touching is good button design. (a) True (b) False
29. 29.🌗 Is white on black easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Our rule: buttons are at least 48 px tall. The Start button is 36 px tall. How many px taller must it be?
31. 31.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Cancel button: 60 px tall
    Help button: 32 px tall
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Save button is 28 px tall. How many px taller must it be?
33. 33.Which colour pair is easy to read? (a) yellow on white (b) black on yellow (c) pale pink on white (d) red on green
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 48 px tall
    Next button: 56 px tall
    Help button: 28 px tall (a) Help (b) Save (c) Next
35. 35.True or false: space between buttons is poor button design. (a) True (b) False
36. 36.🌗 Is black on pale grey easy or hard to read on a button? (a) hard to read (b) easy to read
37. 37.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Start button: 52 px tall
    Next button: 68 px tall
    Back button: 36 px tall (a) Start (b) Back (c) Done (d) Next
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 40 px tall
    Next button: 64 px tall
    Done button: 36 px tall
39. 39.True or false: strong colour contrast is good button design. (a) False (b) True
40. 40.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design

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