App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 382 · 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. Which button is too small?
   Next button: 52 px tall
   Back button: 28 px tall
   Cancel button: 52 px tall (a) Back (b) Cancel (c) Next
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 48 px tall
   Start button: 44 px tall
   Next button: 32 px tall
   Back button: 44 px tall
3. 3.True or false: grey text on grey is good button design. (a) False (b) True
4. 4.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
5. 5.🌗 Is dark blue on white easy or hard to read on a button? (a) hard to read (b) easy to read
6. 6.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 44 px tall. How many px taller must it be?
7. 7.True or false: strong colour contrast is poor button design. (a) True (b) False
8. 8.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design
9. 9.🔘 Our rule: buttons are at least 48 px tall. The Help button is 28 px tall. How many px taller must it be?
10. 10.True or false: space between buttons is good button design. (a) False (b) True
11. 11.Which colour pair is hard to read? (a) white on dark green (b) dark blue on black (c) black on yellow (d) white on black
12. 12.🔘 Is this good or poor button design: buttons almost touching? (a) poor design (b) good design
13. 13.True or false: a big, easy tap area is poor button design. (a) True (b) False
14. 14.True or false: buttons almost touching is good button design. (a) True (b) False
15. 15.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 24 px tall
    Save button: 48 px tall
    Done button: 68 px tall
    Next button: 60 px tall (a) Next (b) Done (c) Cancel (d) Save
16. 16.Which colour pair is easy to read? (a) black on pale grey (b) dark blue on black (c) light grey on white (d) red on green
17. 17.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Send button: 48 px tall
    Back button: 52 px tall
    Save button: 28 px tall (a) Back (b) Cancel (c) Save (d) Send
18. 18.Which colour pair is easy to read? (a) dark blue on white (b) dark blue on black (c) pale pink on white (d) light grey on white
19. 19.True or false: a clear word like Save is good button design. (a) True (b) False
20. 20.Which colour pair is hard to read? (a) black on yellow (b) white on black (c) dark blue on white (d) pale pink on white
21. 21.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Done button: 40 px tall
    Next button: 60 px tall
    Send button: 40 px tall
    Back button: 56 px tall
22. 22.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
23. 23.🔘 Our rule: buttons are at least 48 px tall. The Help button is 32 px tall. How many px taller must it be?
24. 24.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
25. 25.🔘 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
    Send button: 40 px tall
26. 26.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
27. 27.True or false: icons with no meaning is good button design. (a) True (b) False
28. 28.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Done button: 52 px tall
    Send button: 28 px tall
    Save button: 56 px tall (a) Done (b) Save (c) Send
29. 29.🌗 Is pale pink on white 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 Back 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?
    Done button: 60 px tall
    Save button: 32 px tall
    Help button: 36 px tall
32. 32.Which colour pair is hard to read? (a) yellow on white (b) dark blue on white (c) black on pale grey (d) white on black
33. 33.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 32 px tall. How many px taller must it be?
34. 34.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Send button: 60 px tall
    Save button: 52 px tall
    Start button: 52 px tall
36. 36.True or false: a tiny 20 px button is good button design. (a) False (b) True
37. 37.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
38. 38.🔘 Our rule: buttons are at least 48 px tall. The Help button is 20 px tall. How many px taller must it be?
39. 39.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Next button: 60 px tall
    Done button: 40 px tall
    Save button: 36 px tall
    Send button: 56 px tall
40. 40.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read

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