Go to the Data source page.

Click on the button to display the list of device variables.

To edit an existing variable, click the edit button of the variable of your choice:

The edit page is identical to the add page except that it is pre-filled with the data recorded for this variable.

The tag name can be changed. It must contain only lowercase or uppercase letters and digits.

All the information is mandatory.

When you confirm the changes, you are redirected to the Variables list page.