The command-line interface, which is docked by default along the bottom
edge of the drawing area, serves as your primary method of interacting with
AutoCAD. You use this interface to tell the software what you would like it to do for you, and the software uses this interface to communicate the information it needs from you. If you’re just getting started with AutoCAD, this interaction may feel a little abstract at first. A golden rule of using AutoCAD is that when you’re in doubt about what you need to do, or what the program is expecting you to do, look at the command line.
Depending on your individual preference, you may choose to display this
interface in either docked or undocked mode, as shown in Figure 1.15. The
default undocked mode helps maximize the available drawing area and enables you to position the command line anywhere onscreen. By contrast, you may choose to dock the command line to the top or bottom of the AutoCAD interface. Doing this will lock the command-line interface to the AutoCAD
Application window, shrinking the available drawing area.
Similar to a paper-tape roll on a printing calculator, the command-line interface,
or command prompt as it’s known within AutoCAD, displays a history of previous
actions as well as a summary of the current calculation. Just as you can choose
when to tear the paper tape on a printing calculator, you can choose the number
of previous command-line entries to display. In its default undocked state, the
command-line interface displays three lines of prompt history, and it can display as
many as 50 lines at any one time. To customize the range of prompt history:
1. Click the wrench icon to the left of the command-line interface.
2. Choose Lines Of Prompt History from the contextual menu, as shown
in Figure 1.16. The command line reads CLIPROMPTLINES Enter new
value for CLIPROMPTLINES <3>:, as shown in Figure 1.17.
F igu re 1 . 1 6 : Choosing Lines Of Prompt History from the undocked