//rotate [degrees]
After you make a selection and copy that selection using the //copy command, you can type this command to rotate the selection (in memory).
When you paste your copied build, it will paste in as a rotated version.
If you type //rotate 180, it spins it around so that it’s facing in the opposite direction.
//flip [direction]
This command is similar. After copying a selection, this command will flip the selection (in memory).