Tools to Assist in Making My Level Symmetrical?

I am trying to make a symmetrical map.

Part of this map involves a pond in the exact middle of the level. I am having a hard time finding the best way to determine where the middle is. Is there some kind of gridline setting that will help me to identify this?

Am I missing something?

-Brian

The Terrain Editor was super helpful. Also Snap to Grid was a good suggestion.

Thanks!

Hey @FleXNSB, make sure your Snap to Grid feature is turned on. That should be very helpful.