there is no option, but if u place a receiver node [ the receiver end of a teleporter] on top of ur object, it won't move. If you want to stabilize it more, put a sender node sideways, so that the crate is inside the sender node [make sure that they are not active].
if u want to float something you use a crate [one person hold it in mid air], have another person put a reciever node on top of that [these will NEVER move once planted on something] then wait a few seconds, and put another crate on top of the receiver node [bottom to top:held crate, receiver node, then placed crate]. Next delete the held crate and the receiver node and crate should stay, if they didnt, then u didnt wait long enough or the held creat underneath was moving. this works for most objects