I don't seem to be able to edit a quote. If I want to reply to someone's post and click quote under that post, the entire post is included in the quote and I can't see how I can reduce it.
Currently not possible. It is on the list.
Rich Text Editor.
To edit a paragraph's style, hit tab to get to the paragraph menu. From there you will be able to pick one style. Nothing defaults to paragraph.
An inline formatting menu will show up when you select text. Hit tab to get into that menu.
Some elements, such as rich link embeds, images, loading indicators, and error messages may get inserted into the editor. You may navigate to these using the arrow keys inside of the editor and delete them with the delete or backspace key.