Hurrah, I found out how to centre text in the old ‘original flavor’ blog post editor on a free WordPress blog. Yes, I know that’s easy to do on the fancy new one, but I still use the old one. And the old HTML center tag has never been supported, because it messes up template themes.

What you do is you get a snippet paster for your browser (try ‘Paste email’ for Chrome browsers, or ‘Paste Email Plus’ for Pale Moon) and set it to paste…

No need to add the end p tag. Here there are also Italics tags. I’m assuming you want a centred picture-title, in italics to clearly distinguish it from the body text.

Demo:

Cats in space!