You can add devices in the Connection view without needing to switch to the List view.
To add a new device in the Connection view:
1/ Click the Settings icon on the toolbar and set the "Add new products" option to ON.
2/ Search for it in the catalog or D-Tools Library in the Item Search bar at the top.
3/ Add the device. The device will be seen in the relevant location, system, and category once you have assigned them to the device.
To connect the new device to another device, click on the new device, press the Ctrl key, and then click on the other device. You will see a connection between the devices.
Check out this article for more details.