I'm not sure I understand your question, but to clarify:
I've been typing each of my posts and then saving them as a draft and then pasting in any relevant code into my draft before re-saving it again and then publishing the post.
For example, if I wanted to have the word 'something' in bold, I would type in the draft post something. Then when I clicked on the preview button, the preview of the post would show me that the word 'something' had changed to bold.
The reason I particularly like doing this is that I discovered the code for changing the colour of my font. I like to use green font for headers and sub-headers and for hyperlinks, rather than plain black font.
When selecting what kind of post I'm going to publish, I quite often select the photo-based option rather than the text-based option, and I've found that the photo-option doesn't have the in-built ability to change fonts that a text-based post has. (Or at least, not as far as I can work out.)
So, by looking at previous text-based posts and also by looking at the code used in some of the drafts of my pages (rather than my posts), I was able to copy and paste the code formatting into my photo-based post and get the same result.
But I can't seem to do that any more, because my draft posts are no longer saved in code but seem to be pre-formatted already.
I hope that makes sense. It was very long-winded, but I'd really like a way of working around this so that I can shape my posts to look the way I want them to look, not to some pre-set version.