Q: How do I import lamp models into an existing drawing in AutoCAD 2000 and later versions?

A: AutoCAD 2000 and later versions work such that using the DXFIN command opens a new drawing window instead of importing the geometry directly into the open drawing. The following lists two ways to import lamp models into your existing drawing:

1. Using the DXFIN or OPEN command - If you attempt to import a lamp model DXF file into an existing drawing (a non-empty drawing), then AutoCAD 2000 will create a new drawing window into which the lamp model will be placed. This is a consequence of AutoCAD 2000's new Multiple Document Interface (MDI) abilities. You can switch between multiple drawing windows by selecting the drawing name under the Window menu item. The lamp in the new drawing window can be copied by first ensuring that all of the lamp layers are ON, then selecting all of its entities, then copying the lamp to the clipboard via a Ctrl-C or by selecting Copy from the AutoCAD Edit menu. Then switch to your existing drawing and select Paste to Original Coordinates from the Edit menu. NOTE: Be sure that both drawings are in the same UCS so that the lamp is pasted into its proper original orientation.
2. Using the INSERT command - The INSERT command now reads both DWG and DXF files. When importing the lamp model this way you can specify the lamp insertion point explicitly in the INSERT dialog or by clicking a point on-screen. If you do not want the lamp to come in as a block, then be sure to the "Explode" checkbox at the bottom of the INSERT dialog. It is recommended that you do Explode the lamp. This will eliminate possible problems with lamp models and blocks. For your convenience, the INSERT command is called when you select the Import Lamp option from the Photopia menu item within AutoCAD. NOTE: The INSERT command does not always scale all parts of the lamp model properly. So if you are applying a scale factor to change the lamp from its original scale in inches to millimeters, for example, then you may have problems. To avoid these problems it is recommended that you do not use the SCALE option in the INSERT dialog and scale as a separate step after the INSERT command is finished.