Composer Features

Auto Complete

Hitting tab tries to auto-complete the word before the caret as a room member
- If no matching name is found, a visual bell is shown
@ + a letter opens auto complete for members starting with the given letter
- When inserting a user pill at the start in the composer, a colon and space is appended to the pill
- When inserting a user pill anywhere else in composer, only a space is appended to the pill
+ a letter opens auto complete for rooms starting with the given letter
: open auto complete for emoji
Pressing arrow-up/arrow-down while the autocomplete is open navigates between auto complete options
Pressing tab while the autocomplete is open goes to the next autocomplete option, wrapping around at the end after reverting to the typed text first.

When selecting text, a formatting bar appears above the selection.
The formatting bar allows to format the selected test as: bold, italic, strikethrough, a block quote, and a code block (inline if no linebreak is selected).
Formatting is applied as markdown syntax.
Hitting ctrl/cmd+B also marks the selected text as bold
Hitting ctrl/cmd+I also marks the selected text as italic
Hitting ctrl/cmd+> also marks the selected text as a blockquote

When hitting the arrow-up button while having the caret at the start in the composer, the last message sent by the syncing user is edited.
Clicking a display name on an event in the timeline inserts a user pill into the composer
Emoticons (like :-), >:-), :-/, ...) are replaced by emojis while typing if the relevant setting is enabled
Typing in the composer sends typing notifications in the room
Pressing ctrl/mod+z and ctrl/mod+y undoes/redoes modifications
Pressing shift+enter inserts a line break
Pressing enter sends the message.
Choosing "Quote" in the context menu of an event inserts a quote of the event body in the composer.
Choosing "Reply" in the context menu of an event shows a preview above the composer to reply to.
Pressing alt+arrow up/arrow down navigates in previously sent messages, putting them in the composer.