It is now called Trace and Reference.
You can right click on any storey, section, elevation, detail, view point or layout and choose "Show as trace reference".
This can be done from anywhere also (any storey, section, elevation, detail, view point or layout) so you can have a trace not only in a floor plan but anywhere else too.
The trace palette needs to be turned on so you can control the trace (ghost).
ALT-T is the shortcut on Windows.
Barry.
One of the forum moderators.
Versions 6.5 to 27
Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10
Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11