IntelliCAD - cadinfo.net

A frequent need in CAD is to use a set of pre-drawn symbols, such as schematic symbols in electronics or piping.  Some CAD products have special provision for symbol libraries and provide a system for selecting items from the libraries by picking from illustrations of the items.  Usually the sets of symbols are stored in some special file format as a library, and there may be separate libraries for various fields of work.

Using blocks to build a convenient component library reduce the drawing overhead associated with repetitive drawing geometry.  Now we look at the benefits of using external reference files and discuss appropriate ways of introducing them into your drawing practise.