Within a specific list, select the Tags section from the filter panel on the right-hand side of the page. This will enable you to filter on tags and add specific tags to your table.

Note that you must be in a list or market to use custom tags. If you don't see the Tags button in your filter panel, you are in a Sector. 

To add tags, click on the Add tags text. A pop up will prompt you to choose the tags to include in your list.

You can choose to include or exclude tags as column headers by selecting the settings icon within the table view. Otherwise, any tags you add to your list will be shown in the table by default.