In the Edit Operation window, double click on Pwat-Parm2. A new window will appear for editing the values of the Pwat-Parm2 table for this Perlnd operation.
Click on the first row of the LZSN column. Edit the LZSN value, making it 13.1. After entering the number click the OK button. Click the OK button for the Edit Operation window as well.
At this point you have made a change to the UCI, but the file has not been saved. To save the changes, select the File menu and choose the Save option. This option will overwrite the previous version of the UCI with the revised version.