Select Two Areas and Link/Connect Them

Working on my worldbuilding and ran into a Area I wanted to make for a mountain range. Naturally the range isn’t a perfect straight line. Current solution I know of/used was just to make different areas and overlap them and giving them all the same name/image/description as I could.

Would be nice to be able to select a few different areas and link, connect, or merge somehow where they are treated as all one area with the same name/description without needing to do so manually.

Also, wouldn’t be opposed to Area zones that can be rotated angle wise say at a 45 degree angle and/or Area Zones of different shapes such as circle or triangles. Which I think if there a way to link areas could allow people to make most area shapes with some work.