# Read and arrange your documents

Canonical: https://heedit.ai/docs/workflows/read/
Language: en

A report, spreadsheet and deck can share one window without first becoming the same format.

## Open each format on its own terms

Markdown uses the Heedit editor. PDF, HTML and images use dedicated readers. Plain text, structured text, logs, diffs and notebooks use native read-only canvases; CSV and TSV remain grids; Office, RTF and iWork documents use the macOS system preview.

- [Check the supported-format matrix](https://heedit.ai/docs/reference/formats/): See editing, preview and Agent-read boundaries for every format family.

## Keep related documents together

Drop a document on a canvas to open it there, or use Window → Split to the Right… / Split Below… to place it beside or below the current one. A window supports up to three panes. File → Open Recent lists recent files; Command-F searches the focused document when that format supports search.