Once the command is started, draw mirror line by selecting start and end point. After that, draw continuous lines in either side of the mirror line. The continuous lines will be automatically mirrored to the other side of the mirror line.

The installer that ran when you downloaded this plug-in from Autodesk App Store has already installed the plug-in. You may need to restart the Autodesk product to activate the plug-in. To uninstall this plug-in, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) or Control Panel > Add or Remove Programs, and uninstall as you would any other application from your system.