Within Teamwork Desk, you can customize which columns appear when viewing a particular inbox.
To change which columns are displayed, go to the Tickets area of your site and select an inbox from the left sidebar.
Once you are viewing the inbox, select the customize columns icon in the top right.
Using the checkboxes, you can select which columns you would like to see.
The tickets list will automatically update to reflect your current column selection.
You can also resize the selected items within the inbox view by hovering your mouse over the line separating each and clicking and dragging to change size.
For more information, see: Viewing Ticket Activity