​

Here you can choose the source fields you want to connect. The separator can be any character, it will appear between the connected values in the new virtual field. To create a new row click directly below the last row. You can delete a row if you select it and then press Delete on your keyboard.

Click on Next when you are done.

 

The following window will appear:

 

 

Finally you click on Finish. You have created a virtual field!