When asking a question, a sidebar provides an editing quick reference, and clearly points to the full manual. When answering a question, the "?" visual icon leads to the manual.
At this site (as apparently with other StackExchange sites) the manual is available at https://tex.stackexchange.com/editing-help but I couldn't find a link to it anywhere on the site itself. The MO FAQ points to the editing manual, and I found this useful. I tend to ignore small visual icons, instead focusing on the textual elements, and didn't immediately see how to find editing help when composing an answer.
Could a link be added to the FAQ?