Press "H" to toggle Human-Scale helper.
This helps you size and position items in a way that will correspond to the human-scale experience of them in VR.
Press "G" to toggle Grid View:
Grid-view lets you see the X-Z plane and major and minor intervals along the grid.
Press "Shift + G" to toggle Snap-to-Grid mode:
Access Snap-to-Grid controls under: edit > view > grid
- Grid unit is in meters
- Entities / Mesh Entities will snap their pivot (center X, center Y, centerZ) to the nearest point that with component multiples of the grid unit (X,Y,Z)