To dock the command window

• Click the title bar and drag the command window until it is over the top or bottom docking region of the AutoCAD window. When the command window becomes the same width as the AutoCAD window, release the mouse button to dock it.

  The docking region is an edge of the AutoCAD application window that allows you to dock a toolbar, palette, or the command window.

• Right-click the title bar of the Command window, and select Allow Docking.
  NoteYou can control whether the command window docks by right-clicking the title bar of the command window and then clicking Allow docking.