The area you own is marked with a green line.
If you try to add a new voxel outside the area you own (32m x 256m x 32m), the action will fail.
In this case, hold down the CTRL key while adding the voxel. You can add new voxels. The area is updated based on the current location.
Voxel objects outside the area are no longer yours. So other players can edit the voxels.
[How to install]
The installation method of UWP version is the same as above.