Issuer field/Special fields

To Update the issuer field/Special fields:

Right click on the Overwrite field.
You see the Overwrite dialog.
To select a value other than what is displayed on the drop-down list, click the ellipses...
You see the Select Issuers dialog.
Enter an Issuer ID or as much of the name as you know and then click the + to Search.
You see the results of the search displayed in the grid below.
Select the issuer by checking on the corresponding check box and then click Ok.
Click Apply and then click Save.