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Use comments to discuss the Canvas with everyone who can access it. Comments are shared; agent chats remain private.
Comments appear when enabled for your organization. Canvas Viewers can comment as well as Editors and Owners. Archived Canvases are read-only.

Start a thread

1

Choose what to discuss

Point to a card or the location on the Canvas you want to annotate.
2

Add a comment

Press Q, or choose Comment from the menu, then place the comment. Use C when you want a private Quick Chat instead.
3

Write and send

Describe the question or change. The comment appears as a pin that collaborators can open.
A comment attached to a card follows that card when it moves. A comment placed on empty Canvas stays at its location.

Reply and find threads

Click a pin to open its conversation and reply. The Canvas explorer also lists comment threads so you can find discussions on a crowded Canvas.

Resolve and reopen

Choose Resolve thread when a discussion is finished. Resolved threads can be reopened with Unresolve thread. Resolving a thread marks the discussion as handled; it doesn’t change the card’s content.

Use comments as agent context

The agent can read Canvas comment threads when you ask it to review the feedback. Ask, for example: “Read the unresolved comments and summarize the requested changes before editing.” Posting a comment doesn’t itself start an agent conversation or grant the agent permission to act. Direct the work from your private session and use permission controls to review commands.