Select the first and second-line or segment of the polyline (the combination is possible) and the app completes the corner.

The installer that ran when you downloaded this app/plug-in from 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.

To set your own layer open file "completeCorner_v1.03.lsp" in text editor (for example notepad) and edit line with "(setq hln "my help layer")".

If you want to set the current layer use this sequence "(setq hln nil)".