An Obsidian workspace describes the panes, tabs, and views inside Obsidian. External browser, PDF, Finder, or media windows remain macOS objects outside that workspace. Combining the two layers requires an explicit source trail.
Save the note-side layout
Arrange the outline, active note, backlinks, or other panes needed for a repeatable writing or review activity. Save that internal layout as a workspace when you expect to return to it. Keep the vault and note identity visible so a similar window is not mistaken for another project.
Record source links and local file references in the note rather than relying on external windows staying open. Obsidian stores vault data as local files under the user-selected folder; optional services or plugins may add their own behavior and should be evaluated separately.
Organize external references by current task
Open only the browser pages and PDFs required for the section you are working on. Put the most important reference beside Obsidian, and close it after the relevant fact or decision is captured with a durable link.
Restore at the correct layer
Reopening an Obsidian workspace does not promise to restore unrelated app windows or their live state. Wallo can group the current Obsidian window with those external windows, but it does not inspect notes, vaults, plugins, or links, and it does not recreate closed research sessions.