Go to the Data source page.
To access the variables of a device, click the button indicating the number of variables of the corresponding device in the table
You are then redirected to the equipment variables page where you can perform the following actions:
Add a variable;
Edit a variable;
Delete a variable;
Apply filters on the list of variables to find the variable wanted;
Browse the list of variables;
Return to the device list.
Variables are sorted by default alphabetically on the tag names.