How to add a new Tag to multiple companies

You can quickly organise your available tags from Other Items → Tags

From here you can add a new Tag using the menu item at the top left. If you click the title of a Tag in the table view, you will see all the details related to that Tag.

You can also quickly add a Tag to multiple companies using the Edit button:

This will open an edit window where you can rapidly edit the Companies that have that Tag attached.