Let's say I'm answering a question and want to include a small schematic image in-line with the answer.
First, the documentation for the post editor markup language is well hidden. When I actually had this problem, I looked all around the window and found no "edit help" link or anything like it. I found something like it later when editing one of my posts, but that seems to be hit or miss. For example, right now after scrolling down the browser window there is a box "Similar Questions" where the other time there was a box with links to editing help. Right now I see no way to access editing help from this page.
Anyway, apparently "!", followed by desription in brackets, followed by a link in parenthesis makes the content of the linked image appear in line. However, that is still linking to the image in the temp directory on my server. I'm not going to keep it there for more than a few days. How do I get the forum server to make a copy and then tell me the link to that copy so that the embedded image remains in the post after I delete the temporary copy on my server?
Also, where is this documented? I'd like to RTFM, but all I've found is https://electronics.stackexchange.com/editing-help, which doesn't say anything about copying references to the forum server.