App Dev Worksheet: Button Size and Contrast

App development lesson 12: Buttons: size and contrast · Set 395 · 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.Which colour pair is easy to read? (a) light grey on white (b) dark blue on black (c) pale pink on white (d) white on dark green
2. 2.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Send button: 40 px tall
   Next button: 48 px tall
   Done button: 32 px tall
3. 3.Which colour pair is easy to read? (a) dark blue on black (b) dark blue on white (c) red on green (d) yellow on white
4. 4.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
   Done button: 36 px tall
   Help button: 48 px tall
   Start button: 44 px tall
   Next button: 44 px tall
5. 5.True or false: icons with no meaning is good button design. (a) False (b) True
6. 6.True or false: a big, easy tap area is good button design. (a) True (b) False
7. 7.🌗 Is white on dark green easy or hard to read on a button? (a) hard to read (b) easy to read
8. 8.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
   Done button: 56 px tall
   Save button: 60 px tall
   Send button: 48 px tall
   Next button: 28 px tall (a) Save (b) Done (c) Send (d) Next
9. 9.🔘 Is this good or poor button design: buttons almost touching? (a) good design (b) poor design
10. 10.Which colour pair is easy to read? (a) pale pink on white (b) red on green (c) light grey on white (d) black on yellow
11. 11.Which colour pair is easy to read? (a) light grey on white (b) pale pink on white (c) black on pale grey (d) yellow on white
12. 12.🔘 Our rule: buttons are at least 48 px tall. The Next button is 24 px tall. How many px taller must it be?
13. 13.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Cancel button: 60 px tall
    Next button: 44 px tall
    Done button: 52 px tall
    Start button: 52 px tall (a) Start (b) Cancel (c) Next (d) Done
14. 14.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Send button: 32 px tall
    Cancel button: 48 px tall
    Start button: 68 px tall
    Back button: 68 px tall (a) Send (b) Cancel (c) Back (d) Start
15. 15.True or false: buttons almost touching is good button design. (a) True (b) False
16. 16.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Save button: 48 px tall
    Send button: 64 px tall
    Back button: 56 px tall
    Cancel button: 48 px tall
17. 17.🌗 Is dark blue on black easy or hard to read on a button? (a) hard to read (b) easy to read
18. 18.🔘 Our rule: buttons are at least 48 px tall. The Save button is 24 px tall. How many px taller must it be?
19. 19.🔘 Is this good or poor button design: grey text on grey? (a) poor design (b) good design
20. 20.🔘 Is this good or poor button design: icons with no meaning? (a) poor design (b) good design
21. 21.🔘 Our rule: buttons are at least 48 px tall. The Help button is 40 px tall. How many px taller must it be?
22. 22.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 60 px tall
    Back button: 32 px tall
    Send button: 40 px tall
23. 23.True or false: strong colour contrast is good button design. (a) True (b) False
24. 24.🌗 Is yellow on white easy or hard to read on a button? (a) easy to read (b) hard to read
25. 25.🔘 Our rule: buttons are at least 48 px tall. The Back button is 36 px tall. How many px taller must it be?
26. 26.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 24 px tall. How many px taller must it be?
27. 27.🔘 Our rule: buttons are at least 48 px tall. The Start button is 24 px tall. How many px taller must it be?
28. 28.True or false: buttons almost touching is poor button design. (a) False (b) True
29. 29.🌗 Is dark blue on white easy or hard to read on a button? (a) easy to read (b) hard to read
30. 30.🔘 Is this good or poor button design: a clear word like Save? (a) good design (b) poor design
31. 31.Which colour pair is easy to read? (a) white on black (b) dark blue on black (c) red on green (d) light grey on white
32. 32.🌗 Is white on black easy or hard to read on a button? (a) hard to read (b) easy to read
33. 33.🔘 Our rule: buttons are at least 48 px tall. Which button is too small?
    Help button: 24 px tall
    Save button: 64 px tall
    Start button: 60 px tall
    Next button: 48 px tall (a) Next (b) Help (c) Start (d) Save
34. 34.🌗 Is light grey on white easy or hard to read on a button? (a) easy to read (b) hard to read
35. 35.🔘 Our rule: buttons are at least 48 px tall. The Cancel button is 36 px tall. How many px taller must it be?
36. 36.🔘 Our rule: buttons are at least 48 px tall. How many of these buttons follow the rule?
    Start button: 56 px tall
    Next button: 32 px tall
    Cancel button: 48 px tall
37. 37.🔘 Our rule: buttons are at least 48 px tall. The Done button is 44 px tall. How many px taller must it be?
38. 38.🔘 Is this good or poor button design: space between buttons? (a) good design (b) poor design
39. 39.🔘 Is this good or poor button design: a big, easy tap area? (a) good design (b) poor design
40. 40.🔘 Is this good or poor button design: strong colour contrast? (a) good design (b) poor design

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