Thank you I am glad you like it. No special editor, just classic Steemit post publish. Quick tip for you:
to make text like this write _ this at beginning and _ at the end. It should be together, no space.
to make a bold headline just use -- down like this:
Thanks for your answer! Do you recommend for me an article about special characters?
I just googled it - steemit text edit - and there are couple of old articles that work.