The Workspace toolbar contains the following buttons that affect the Workspace panel:
Close All Editors - Closes all editor panes that are displayed in the Workspace panel. Alternatively, use the Shift+Ctrl+F4 shortcut. For more information on closing editor, see details.
Default Docking in Workspace - Restores the default docking settings for the editor panes displayed in the Workspace panel. For more information on the docking in the Workspace panel, see details.