If you want to delete all properties in a portal, click on the Actions option at the top and then on the Property actions item. Use the full portal comparison to mark all properties for deletion.

And a window opens.
Select a transmission type. To delete the properties, please click on “Delete all properties”. Then select a portal in which you would like to delete the properties and then click Next.

You now have the option of selecting the start time. You can decide whether to do this immediately or at a certain point in time. Also enter your e-mail address to receive confirmation of completion.
