A similar question has been posed and answered:  Composer and 2D drawings are not compatible. One reason we went with Composer was the benefit that, if a model changed, we could easily update the technical information based on the 3D geometry revisions. When - in our manuals and guides - we show a drawing like a fluid or air schematic, how can those diagrams be updated in the online or printed documents without resorting to replacing a .JPG or a .PDF image of the drawing.  This auto-update feature is a key selling point of Composer, yet - to my mind - it falls short in an important component.