
Open an invoice → detail page → chat/comments panel
Open the invoice detail page.
Review the chat timeline at the top.
Scroll within the chat panel to see older messages.
The panel auto-scrolls to the newest message when new activity appears.
Click the comment composer at the bottom.
Type your message.
Press Enter, or click the send button.
Use Shift+Enter for a line break.
Leave the comment empty to keep sending disabled.
Type @ in the comment composer.
Choose a person, a team, or approvers when available.
Press Enter or Tab to insert the mention.
Send the comment to notify them.
Mentions only work for people and teams in your organisation.