Is it possible to add either Owned By or Followed by columns to the main screen for Tasks? For is this page not customizable from the standpoint of hiding/showing columns?
At this time the Owned By and Followed By columns are not available on the main screen for tasks. Nor is this page customizable. There are a few other ways to get at this data. One is to export the task list to Excel/CSV. This exported file will include the Owned By and Followed By columns. A second way is to hold the mouse for a second or two over the task title. A third way is to select the Owners and Followers from the filters in the left column to view the task list through that particular lense.