• In advance, before calling the Zone command, you need to take care of choosing the correct coordinate system (UCS). You also need to break the loops on all self-intersecting polylines and splines with the _break command anywhere in each loop.
• You can select drawing objects (any curves) in advance, before calling the command. But in this case, you will not see options for switching styles on the command line.
• Call the Zone command. If no objects have been selected yet, the command will ask you to select. In the prompt, you will see options to switch styles and open a settings dialog. You can also configure the Zone command from the A>V>C> Options Palette.
• Next, the program will ask you for the offset distance. The width of the zone will be equal to two of these distances. This request can be disabled and then the program will use the distance from the current Zone style.
• Next, the program will start working:

• • First of all, all objects based on the specified filtering conditions will be discarded. By default, objects of inappropriate types (ray, solids, texts, etc.) are discarded and objects from auxiliary layers are discarded. Before writing to technical support that the program does not process your curves, first read all the program messages on the command line - it indicates which filter worked and why the object was discarded.
  • All selected curves will then be projected onto the XY plane of the current user coordinate system UCS.

• • Two offsets of each curve will be made in both directions at an equal distance. If the original curve is closed, then you get two closed contours.

• • If the original curve is not closed, then the program will close the ends of the offset curves in a straight line or along an arc (the radius of the arc is the same as the offset distance).

• • Next, the resulting zone contours around each curve will be combined into a single zone. If there were splines or ellipses among the original lines (after projection onto XY), then a closed spline would be obtained. In all other cases, a polyline will be obtained. A polyline may contain arcuate segments.

• • At the end of the work, the program will assign the resulting contour a specified layer or a default layer. It will display the number of processed curves on the command line.

The installer that ran when you downloaded this app/plug-in from the Autodesk App Store will start installing the app/plug-in. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart the Autodesk product to activate the app/plug-in. To uninstall this plug-in, exit the Autodesk product if you are currently running it, simply rerun the installer, and select the "Uninstall" button. OR, click Control Panel > Programs > Programs and Features (Windows 7/8.1/10/11) and uninstall as you would any other application from your system.

• The program does not work with self-intersecting polylines and splines. You must first break the loop with the _Break command anywhere in the loop. But the result will be combined into a single zone outline.
• The program does not work with Ray, Xline, Multiline, or Blocks.