I want to put comments in the middle of my post which will be invisible to readers and visible only to me on the edit page. I thought that I could use the HTML tags <!-- and --> to surround the comment, but they don't work. The comment and the tags appear in the post for all to see.
How can I put such a comment on my edit page so that only I see it?
The blog I need help with is environmentalessays.wordpress.com.