I have a Layout set up with a legend with many features linked to the Main data frame, that i spent a lot of time setting up. I then added a second data frame to use as an overview map. The legend still says it is pointing at the main data frame but it seems to have lost all items in the legend layers list. The Legend is now empty (it is not like they have been unticked - there are no items there).
Is there a way of adding items back into the legend?
See screenshot of legend with no items but still pointing to main data frame?