Tekla Structures integrates the drawings with the model. A drawing is a window to the model presenting 3D structures in 2D. The building objects shown in the drawing are model objects you create in the model. You can change their representation in the drawing but you cannot change the geometry or the location of the building object, or delete building objects; all changes to building objects are made in the model. That is why the drawings are always up-to-date. For example, dimensions and marks in drawings are always correct. You can filter out parts and bolts in drawings using the filtering tools, or make them invisible by hiding them.
You can create drawings at any stage of the project. Creating single-part, assembly and cast unit drawings requires that the model is numbered, so you need to plan and perform the numbering before creating drawings.
If the model changes, Tekla Structures notifies in the Drawing list that you need to update the related drawings. You cannot open a drawing that is not up-to-date.