On all configuration pages, notice the Import and Export button on the upper right. You can use those to quickly export the devices, variables, alarms, and other items to Excel, edit them, and reimport them.
Note that, when you export a device, it will not export its variables. You need to export these separately. The export and import format is CSV or JSON. Please save the file in the same format, and not in xlsx or another CSV type.
If you wish to change the CSV delimiter, you can do this on the Parameters page.