TO DRAW NEW GRID LINE:

1. Click the Grid Line Pro button in Add-Ins Ribbon Tab. Or write GRIDLINEPRO in Command-Line and press Enter.   
2. Select properties that you want and click OK button.
3. For draw grid line with default properties just click OK button. 
4. Specify the first point to draw grid line.
5. Specify the second point of the grid line.
6. Repeat these steps for each grid line.
7. Press Escape or Enter to cancel the command.

TO EDIT EXISTING GRID LINE:

1. Click the Edit Grid Line Pro button in Add-Ins Ribbon Tab. Or write EDITGRIDLINEPRO in Command-Line and press Enter.   
2. Select grid line that you want to edit.
3. Change grid line properties that you want on editing form. 
4. Click OK button to apply changes. 

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.