Hi Karl,
Near the top of this webpage, there are some links, beginning with "Main Index" & ending with "User List". One of them is "FAQ". Click on that, and then click on the question, "Can I use html in my posts?" The answer section for that question contains the various proprietary tags for this forum and examples of how to use them. Also, here is a link to a thread about how to deal with long urls (hyperlink addresses), so they don't force the webpage to be wider than the viewers' windows.
If those aren't sufficient, post again for more help.
Stay safe,
J.T.