Spaces have bounding boxes that visually represent their extent. In the respective panel (Extent and Box) in the Inspector, you can control whether a bounding box is shown or not, and whether it blocks the selection of content inside of it. The latter options can be used to “lock” content in spaces and to avoid unintended interactions.
Bounding boxes are selectable and movable using a mouse via the Grab Manipulator (Transform Gizmo). On touch devices, you can additionally use multiple fingers and gestures to rotate spaces around their vertical axes and adjust their scales.
On XR headsets, you can interact with bounding boxes by selecting them using one or two controllers. Using only one controller, you can change the position of the content in 3D. Using two, you can rotate it by gyrating both controllers relative to one another, or change the scale of the selected content by moving controllers apart or together.
A space bounding box displayed with axis labels and gridlines. On the right side, the inspector panel Extent and Box shows controls and settings related to the extent of the space, as well as labels and gridlines. Here, you can also toggle whether the bounding box is shown and whether it blocks its content from being selected via direct interaction in the 3D workspace.