Type ADSLPTR in the command line and press enter or click on the ribbon button at the Add-ins tab.

Select the slope top 3Dpolyline or press S and Enter to open the settings dialog box.

In the dialog box, you can define whether the pattern will be orthogonal to the bottom 3D polyline (usually in cut slopes) or top 3D polyline (usually in fill slopes), and the distance between pattern ticks. Set the options as you prefer and click OK.

After setting the dialog box, select the slope top 3Dpolyline and then select the slope bottom 3Dpolyline to draw the slope pattern as configured.

You can set the dialog box one time. The settings will remain saved while your file is open. Access the dialog box again only if you want to change the settings, by pressing S when the command starts.

The installer that was run when you downloaded this app/plugin from the Autodesk App Store will start installing the app/plugin. OR, simply double-click the downloaded installer to install the app/plugin. You may need to restart your Autodesk product to activate the app/plugin. To uninstall this plugin, 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 system application.

The app doesn't work fine by selecting closed 3D polylines to slope the top 3D polyline or bottom 3D polyline. In this case, it is recommended to break the closed 3D pipelines and execute the app to each.