App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 314 · 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 tiny 20 px button? (a) poor design (b) good design
2. 2.Which colour pair is hard to read? (a) light grey on white (b) dark blue on white (c) black on pale grey (d) white on black
3. 3.Which colour pair is hard to read? (a) white on dark green (b) red on green (c) white on black (d) black on yellow
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
5. 5.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
6. 6.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
7. 7.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Send button: 36 px tall
   Back button: 68 px tall
   Cancel button: 52 px tall (a) Send (b) Back (c) Cancel
9. 9.🌗 Is black on yellow easy or hard to read on a button? (a) hard to read (b) easy to read
10. 10.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Save button: 72 px tall
    Start button: 32 px tall
    Send button: 56 px tall (a) Save (b) Start (c) Send
11. 11.True or false: a big, easy tap area is good button design. (a) True (b) False
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Start button is 40 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. The Help button is 36 px tall. How many px taller must it be?
14. 14.Which colour pair is easy to read? (a) black on pale grey (b) yellow on white (c) pale pink on white (d) dark blue on black
15. 15.True or false: a tiny 20 px button is poor button design. (a) False (b) True
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 52 px tall
    Back button: 48 px tall
    Next button: 32 px tall
    Send button: 40 px tall
17. 17.🔘 Is this good or poor button design: a big, easy tap area? (a) poor design (b) good design
18. 18.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Start button: 48 px tall
    Cancel button: 68 px tall
    Send button: 60 px tall
    Back button: 32 px tall (a) Send (b) Back (c) Start (d) Cancel
19. 19.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Help button: 56 px tall
    Save button: 52 px tall
    Back button: 72 px tall (a) Save (b) Help (c) Back (d) Cancel
20. 20.True or false: a clear word like Save is good button design. (a) True (b) False
21. 21.True or false: buttons almost touching is good button design. (a) True (b) False
22. 22.True or false: grey text on grey is poor button design. (a) False (b) True
23. 23.🔘 Is this good or poor button design: grey text on grey? (a) good design (b) poor design
24. 24.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Back button: 56 px tall
    Done button: 40 px tall
    Next button: 52 px tall (a) Back (b) Next (c) Done
25. 25.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Help button: 52 px tall
    Save button: 60 px tall
    Next button: 40 px tall
    Start button: 40 px tall
26. 26.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
27. 27.Which colour pair is easy to read? (a) light grey on white (b) black on yellow (c) pale pink on white (d) dark blue on black
28. 28.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
29. 29.🔘 Our rule: buttons are at least 48 px tall. The Help button is 24 px tall. How many px taller must it be?
30. 30.True or false: grey text on grey is good button design. (a) True (b) False
31. 31.🔘 Our rule: buttons are at least 48 px tall. The Back button is 20 px tall. How many px taller must it be?
32. 32.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Save button is 32 px tall. How many px taller must it be?
34. 34.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 56 px tall
    Save button: 28 px tall
    Help button: 64 px tall
    Back button: 52 px tall (a) Help (b) Send (c) Back (d) Save
35. 35.🌗 Is black on pale grey easy or hard to read on a button? (a) easy to read (b) hard to read
36. 36.🔘 Is this good or poor button design: a clear word like Save? (a) poor design (b) good design
37. 37.🔘 Is this good or poor button design: strong colour contrast? (a) poor design (b) good design
38. 38.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 64 px tall
    Send button: 56 px tall
    Back button: 56 px tall
    Next button: 24 px tall (a) Back (b) Next (c) Cancel (d) Send
39. 39.True or false: space between buttons is poor button design. (a) False (b) True
40. 40.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?

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