How to put the starter content under the View

Helllo, the lst time I closed the Starter Content and Now when I want to use it, it opens a new window so it’s not convenient to use. Someone knows how to replace it in the global window as modes or world outliner? Thanks you

Your question is a little unclear to me. If you mean that your content browser is now in a different window you probably just want to reset the engine to the default layout.

This can be done in the menu with:
Window > Reset Editor Layout

This is correct. Just to elaborate, you can also drag the toolbar of the window you’d like to dock and move it into one of the dockable locations that appear on your screen while dragging to attach it to the main editor window.