2011

Table Of Contents
System Variables
XREFCTL
Controls whether external reference log (XLG) files are created.
Increase Performance with Large Referenced Drawings
There are several features that can improve performance when dealing with
large referenced drawings.
Overview of Demand Loading
Provides a high-level description of using demand loading to improve
performance when working with large referenced drawings.
The program uses demand loading and saving drawings with indexes to increase
performance with large referenced drawings that have been clipped using the
program or that have many objects on frozen layers. With demand loading,
the program loads into memory only the data from the reference drawing
that is necessary to regenerate the current drawing. In other words, referenced
material is read in on demand. Demand loading works in conjunction with
the INDEXCTL, XLOADCTL, and XLOADPATH system variables.
Quick Reference
Commands
XREF
Starts the EXTERNALREFERENCES command.
System Variables
INDEXCTL
Controls whether layer and spatial indexes are created and saved in drawing
files.
XLOADCTL
Turns xref demand-loading on and off, and controls whether it opens the
referenced drawing or a copy.
Increase Performance with Large Referenced Drawings | 1709