Hallo,wie kann ich aus einer bestehenden Zeichnung einen Block erstellen, bzw der Bibliothek zuführen?Danke und Grüße

Create a block for your library using the WBLOCK command.  Create it on Layer 0 so that when inserted the block will take on the color and the linetype of the layer the block is inserted on.  When asked to specify a basepoint use your OSnaps to pick on part of the block geometry.  Don't use 0,0 as a basepoint for your block.This is all explained in the AutoCAD Help file.