In this table, the name of the attached xref file drawing is House Plan and a layer in that drawing is First Floor and a block named Coffee Table. This table demonstrates how AutoCAD names the xref dependent named objects for layers, linetypes, dimension styles, blocks, and text styles. Table 35-1 shows how the non-graphical names are dealt with by AutoCAD. The names are changed so that no two names are the same.

They are added to the drawing they are attached to as non-graphical object information. Xref dependent named objects are the layers, linetypes, dimension styles, blocks, and text styles of the reference file. A reference file can be edited in the current drawing with the changes going back to the original drawing file.

You can snap to the object snap modes of objects in the reference files. Reference files can be scaled or rotated when they are attached with the XREF command or after they are attached with the SCALE and/or ROTATE commands. All objects in the reference file must be in Model space. You can attach more than one reference file at the same time. The XREF command is used to manage the reference files that are linked to the current drawing. Since it is only linked to the drawing, it does not add a significant amount of data to the drawing’s database. If the drawing that is attached as an xref is changed, the changes will appear when the drawing it is attached to is opened or reloaded. It can also be updated manually by the CAD operator. A reference file updates itself whenever the drawing it is linked to is opened. Usually called a reference fileor a xref, it is quite different from a block. It acts as one object similar to a block and appears to be part of the current drawing. Describe reference files and explain how they are used in an AutoCAD drawing.Īn external reference file is a drawing file linked to the current drawing.When you have completed this module, you will be able to:

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