App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 107 · 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 white on black easy or hard to read on a button? (a) easy to read (b) hard to read
2. 2.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
3. 3.🌗 Is pale pink on white easy or hard to read on a button? (a) hard to read (b) easy to read
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Save button: 52 px tall
   Send button: 52 px tall
   Done button: 48 px tall
5. 5.🔘 Is this good or poor button design: a tiny 20 px button? (a) good design (b) poor design
6. 6.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Start button: 44 px tall
   Save button: 32 px tall
   Back button: 64 px tall
   Send button: 48 px tall
7. 7.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
8. 8.Which colour pair is hard to read? (a) black on pale grey (b) white on dark green (c) white on black (d) light grey on white
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
10. 10.True or false: a clear word like Save is poor button design. (a) False (b) True
11. 11.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 36 px tall
    Help button: 56 px tall
    Start button: 40 px tall
12. 12.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 72 px tall
    Help button: 44 px tall
    Done button: 56 px tall (a) Help (b) Next (c) Done
13. 13.Which colour pair is hard to read? (a) dark blue on black (b) white on black (c) black on pale grey (d) dark blue on white
14. 14.Which colour pair is easy to read? (a) pale pink on white (b) light grey on white (c) black on pale grey (d) yellow on white
15. 15.🌗 Is black on yellow 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. Which button is too small?
    Send button: 36 px tall
    Next button: 48 px tall
    Save button: 68 px tall
    Start button: 56 px tall (a) Save (b) Start (c) Send (d) Next
17. 17.True or false: space between buttons is poor button design. (a) False (b) True
18. 18.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 52 px tall
    Save button: 60 px tall
    Cancel button: 36 px tall
19. 19.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
20. 20.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Cancel button: 52 px tall
    Save button: 40 px tall
    Next button: 52 px tall
21. 21.Which colour pair is easy to read? (a) white on black (b) red on green (c) dark blue on black (d) light grey on white
22. 22.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 52 px tall
    Next button: 68 px tall
    Start button: 40 px tall (a) Next (b) Start (c) Save
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Next button: 60 px tall
    Cancel button: 36 px tall
    Save button: 68 px tall (a) Save (b) Next (c) Cancel
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Start button is 20 px tall. How many px taller must it be?
26. 26.True or false: a clear word like Save is good button design. (a) True (b) False
27. 27.Which colour pair is hard to read? (a) dark blue on white (b) white on dark green (c) pale pink on white (d) black on pale grey
28. 28.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
29. 29.Which colour pair is hard to read? (a) black on pale grey (b) black on yellow (c) red on green (d) dark blue on white
30. 30.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 64 px tall
    Send button: 48 px tall
    Help button: 24 px tall
    Done button: 56 px tall (a) Help (b) Send (c) Done (d) Save
31. 31.Which colour pair is easy to read? (a) red on green (b) pale pink on white (c) light grey on white (d) white on dark green
32. 32.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 72 px tall
    Back button: 24 px tall
    Help button: 60 px tall (a) Back (b) Help (c) Done
33. 33.True or false: space between buttons is good button design. (a) False (b) True
34. 34.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
35. 35.🌗 Is white on dark green easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.True or false: a big, easy tap area is poor button design. (a) False (b) True
37. 37.True or false: buttons almost touching is poor button design. (a) False (b) True
38. 38.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Back button: 44 px tall
    Save button: 64 px tall
    Done button: 64 px tall
    Send button: 48 px tall
39. 39.Which colour pair is hard to read? (a) black on pale grey (b) white on black (c) yellow on white (d) black on yellow
40. 40.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design

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