2013

Table Of Contents
Command: insert
Enter block name or [?]: /files2/olddwgs/part5
If the drawing exists in that location, AutoCAD prompts you to finish the
INSERT command in the usual manner.
Directory Structure
AutoCAD uses tree-structured directories and subdirectories. It is recommended
that you keep supplemental files (such as AutoLISP applications and
customization files) separate from the AutoCAD program and support files.
This makes it easier to track possible conflicts and to upgrade each application
without affecting the others.
The default location for AutoCAD is in the Applications folder. You can create
a new directory on the same level (for example, /AcadApps) and store your
custom AutoLISP and ObjectARX application files, custom linetypes and hatch
pattern files, and other third-party applications in subdirectories on the next
level. If you want to maintain multiple drawing directories (for separate job
files), you can create a directory such as /AcadJobs with subdirectories for each
job.
Command Search Procedure
When you enter a command, AutoCAD goes through a series of steps to
evaluate the validity of the command name. A command can be a built-in
command or system variable, an external command or alias defined in the
acad.pgp file, or a user-defined AutoLISP command. Commands can also be
defined by ObjectARX applications or a device driver command. You can enter
a command on the command prompt or choose a command from the
appropriate menu. Commands can also be entered from a script file or by an
AutoLISP or ObjectARX application.
The following list describes the search order AutoCAD uses to validate a
command name.
1 If the input is a null response (Spacebar or Enter), AutoCAD uses the
name of the last command issued.
2 AutoCAD checks the command name against the list of built-in
commands. If the command is in the list and is not preceded by a period
(.), AutoCAD then checks the command against a list of undefined
commands. If the command is undefined, the search continues.
Otherwise, the command is run, unless another reason prevents it from
4 | Chapter 1 Basic Customization