The app has 3 commands:

1. 7CADPLINEAREASETUP

Tag block names can be one block name, or many block names, separated by comma. So as inputs for the leader's layer and polyline's layer.

Each Tag block can have 2 attributes associated with 2 polylines in 2 different layers.

For each attribute, you can specify the length factor and suffix to customize the display value. There is also an option to show the length of the polyline on the attribute instead of the Area.

2. 7CADPLINEAREA

You can easily understand the command's routine by seeing screenshot "How it works" below. Select polylines, and all associated tag blocks will have their attributes updated.

If you enable runtime update in Setup Window, then once you run Stretch command on specific polylines, their areas values will changed and updated to tag blocks automatically.

Note: your drawing can be edited by other users who don't have 7cad Polyline Area software. Therefore, it is not guaranteed that tag blocks always have updated values. Therefore, remember to always run the 7cadPlineArea command to update tag blocks before publishing your drawing.

3. 7CADPLINEAREAREVIEW

+ As seen in screenshot "7cadPlineAreaReview command", by clicking the arrow buttons, this command will loop through the collection of last run objects, and highlight them so that you can see their area or length properties in Autodesk® AutoCAD® Properties Panel.

+ Check those area and length values with your tag block attributes to see if the 7cadPlineArea and 7cadPlineSetup commands have been run properly.

+ After each run of 7cadPlineArea, the tag block's attributes are exported to a text file in the temp folder. From the 7cad Pline Area Review window, you can open that text file and save that data to other relevant places.

A free online version of the app can be found here on my website: 7cad Polyline Area Online

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.