In PowerPoint 2016, whenever I go to File Open, Save, Save As, the window that opens has a left column for places (such as OneDrive or my computer), a middle column with file locations and names, and a right column with what I imagine is a file preview area. This rightmost column is always blank though.

I would love to close it so I could see the entire location and file name that is displayed in the middle column. The file names are now so long that I can't really see them because they show up truncated, and the rightmost column is just in the way.

I've searched online everywhere but I only find references to File Explorer or Outlook. Anyone know how I can close the right pane?

Thanks.