I submit HTML files. According to the Text Formatting Guide, there's only a very short list of HTML-Tags that don't get filtered out, and the CENTER-tag is not part of that list. It also states that all CSS will be removed.
So... will it work if I add an "align='center'" to a p-tag, or will that get filtered out as well?
Not a stupid question. If you don't want to mix HTML formatting with markup text, the answer is not obvious.
I will suggest that blockquote might get close to what you want.
will it work if I add an "align='center'" to a p-tag, or will that get filtered out as well?
That will get filtered out.
Blockquote will center a paragraph(s), but it will put a vertical line on the left.
You can use Tagged Text.
{c} at the beginning of a paragraph will cause the whole paragraph to be centred.
https://storiesonline.net/doc/Text_Formatting_Information_Guide#tags
Actually, it's not so cut and dry.
The html-to-tags converter built into the system tries to extract whatever is supported in the site's tags.
So, if the following stuff is in the html formatting, it will use it:
< center> tag
< p> tag with 'center' in the style. example < p style="text-align: center"> or < p align="center"> or < p class="c"> are all supported.
Of course, < p>{c} also works easily.
When you center your text in MS Word (or whatever word processor you're using) and export your text into html, the system will try to respect the centering if the word processor created reasonable html.