Centering a Hex Grid on a map

TheIneffableCheese

I'm experimenting with some mapping ideas, and I want to create a map with a hex grid that has a full hex specifically centered in the map with the rest of the grid tiled out from that.

I've already moved the origin to the center of the map. What I would like to do is designate 0,0 as the centerpoint for a hex in the grid, and have rest of the map filled from there. I know the default is to put the origin corner at 0,0 - is there any way to tell CC3+ to spread out from 0,0 instead of making that the corner?