You can move transactions from the main folders to user created subfolders in Transaction Manager. For more information on creating folders, see Creating a Folder.
To move transactions from main folders to subfolders:
Open the Transactions view from the navigation menu.
Click the appropriate folder in the Transactions menu.
Select the transaction(s) to be moved and select Options | Move to... from the action bar.
Click the destination sub-folder and click OK.
The transaction(s) are moved to the appropriate folder.