The spreadsheet owner controls sharing. Choose Share in the editor.
Add a person's CollabOS email and choose Viewer, Commenter or Editor. The person must sign in with that verified email. Adding access does not send an email; choose Copy link and send the link to them. Their shared sheet also appears under Shared with me.
Restricted means only the owner and explicitly invited accounts can open the sheet. Anyone with the link allows viewing without a CollabOS account. When link access is Commenter or Editor, visitors must sign in before they can comment or edit.
Viewers can read and copy data. Commenters can also add cell comments. Editors can change cells, formatting, worksheet tabs and the document title. Only the owner can grant access, change link settings or move the document to Trash.
Remove a person from the sharing dialog to revoke their explicit access. If Anyone with the link remains enabled, they can still use that link at its configured permission level. Choose Restricted to remove public link access. Reset link invalidates the previous shared URL.
Copying a sheet creates a new private spreadsheet owned by the person making the copy. It does not copy the original sharing permissions. Moving a sheet to Trash prevents access, including by link. Restoring it keeps general access Restricted until the owner enables link sharing again.