Read in the Help about Virtual Trace, Trace and Reference, etc. It is all there. You will want the Trace & Reference palette open for easiest use - just click the upper left button to turn the reference off.
Cheers,
Karl
One of the forum moderators
AC 27 USA and earlier • macOS Ventura 13.6.6, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB