I tend to indent `Given`, `When`, `Then`, `And` and `But` so that there step text lines up:

```` gherkin
Given the fact that "Given" is 5 characters
 When using a keyword that is 4 characters
 Then it is indented an extra space to align
  And a line starting with a 3-character keyword is indented two spaces
```

I've been pretty consistent in all the cukes I've written but we're probably not universally consistent.