You can create a custom symbol in 2 ways:
1. Create the list from the portfolio manager by entering the symbols manually as shown here:
2. Create the list a .txt file or a .csv file and upload it into the scanner or into the Portfolio Manager
Text File (.txt)
To create a text file, open your Notepad and type in the symbols on your list.
Comma Delimited File (.csv)
To create a comma delimited file, create your list on a regular Excel file and when saving the file, choose save as a Comma Delimited File (.csv).