There should be a pencil button underneath your posts. Press that to edit. Note that the convention here on BB is to be explicit about substantive edits (as opposed to copy editing, correcting grammar) once someone has responded to you. Usually that’s done by putting the edit in square brackets with the note ETA (“edited to add”). I’ll put an example in my preceding comment to you. Stealth edits substantially changing a comment’s thrust, especially after someone has responded, are frowned upon here.
Also, you can reply directly to a specific comment by pressing the Reply button in it (or by highlighting a specific bit you want to respond to, which will bring up a Quote button, as I did above). No need to keep scrolling to the top.
