As to insert to modify or to cancel a netfriend

To insert a new netfriend to click on the first empty line of the grate

the cursor will appear and therefore you will be able digitare the nick(obligatory) 
and after the other data.

To modify the data of a netfriend is enough that you do double click on his/her line 
and the boxes

ready sarano for the changes.

To cancel a netfriend owe to select the line and to click on the button