How can text (of all formats) be indented?

Question

I refer to https://ell.stackexchange.com/a/20319/8712, but it uses the grey code format. How can one indent in general, including bolded, italicised, sub/super-scripted texts?

Answer 1

if you really need to
　then you can always use
　　this 　 space character
　　　just copy and paste it
　　　　from this answer
　　　　　into your own posts
　　　　　　and put a pair of spaces
　　　　　　　at the end of a line
　　　　　　　　or type <br/>
　　　　　　　　　if you want to insert
　　　　　　　　　　a newline
　　　　　　　　　though
　　　　　　　　keep in mind
　　　　　　　ell isnt a place
　　　　　　for poetry
　　　　　crazy formatting
　　　　or eccentric style
　　　you probably want
　　to format stuff
　like everyone else
at least i do

Answer 2

I'd like to suggest using nested blockquotes, like this:

Aaaa aa aaaa aaaaaaa.

Bbb b bbbbbb bb bbbb bbbb!

C cccccccccc, ccc cc'c ccc cccc ccccccccccc.

Ddd d dddddd dd dddd dddd.
_{Source: Eeeeeee eeeeeeeeee eee eeeeeeee.}

Source:

>Aaaa aa aaaa aaaaaaa.
>>Bbb b bbbbbb bb bbbb bbbb!

>C cccccccccc, ccc cc'c ccc cccc ccccccccccc.
>>Ddd d dddddd dd dddd dddd.  
>><sub>Source: Eeeeeee eeeeeeeeee eee eeeeeeee.</sub>

Answer 3

I don't think you can.

The three places to look for your formatting options on SE are:

1. The help center entry for formatting and its advanced editing counterpart.
2. The whitelist of supported HTML tags on MSE.
3. The official Markdown syntax reference page.

Nothing on those pages suggests, to me, that arbitrary indentation is permitted.

Of course, there may be a sneaky, if imperfect, way to simulate indentation using the formatting tools provided, like nested lists, preformatted blocks of spaces at the beginning of every line, use of fancy Unicode spacers plus<br/>, etc.