You can create customised submitted forms folders in the Web Portal allowing you to see any information from within the form at a glance, creating a custom submitted forms folder also makes it easy to search your forms.
To create the custom tab in the Web Portal, Forms > Submitted Forms > Manage Folders > + New Folder.
In the settings of the Folder you can create a name for your Folder, choose what forms you will see, choose which groups will be able to view the Folder and you will then set your columns and connect any new columns to the fields within the form. Then select Save at the bottom of the page.
When a Submitted Form Folder is created, it needs to process all of the data in your existing forms before they will display under that tab. Depending on how many forms there are to process, and the size of each form, it can take some time before all of your old forms are visible in those folders.