Slack announces Canvas, a collaborative tool that presents contextual information for each channel, helps users edit documents in-app, and more, coming in 2023 (David Pierce/The Verge)

David Pierce / The Verge:
Slack announces Canvas, a collaborative tool that presents contextual information for each channel, helps users edit documents in-app, and more, coming in 2023  —  Slack is becoming a document editor.  The Salesforce-owned company announced today at its developer conference that it is building …