Ctrl+Shift+9 = numbers
Ctrl+Shift+8 = bullet points
Ctrl+Shift+7 = strikethrough
Also ctrl+ [ and ] works for activating and deactivating a level of quotation but you need to have multiple lines of text for it to layer the quote boxes properly.
I am very sure I am one of the only users who knows the shortcuts even now because most ignored when I made that topic and just so you know this doesn't let you properly layer how they do.
The way I am assuming Oromagi and Coal do it is they indent and/or reclick bullet point on either Microsoft Word, Google Docs or a Linux and/or Mac equivalent.
They copy and paste (not as plain text, the normal paste that includes formatting).
There may be a shortcut for indentation that I haven't discovered.
Strikethrough doesn't work when you post the message, it's just for your own visuals while typing.