I am comparing an LC I made with another LC made simultaneously by a different astronomer. The LC made by the other astronomer uses UT (Universal Time) on its X axis, so I would like to do the same for the Plot of Measurements screen. However, I do not see UT as a time option on the Multi-Plot Main screen. There is: J.D.-2400000, JD_UTC, JD_SOBS, HJD_UTC, and BJD_TDB, but no UT. How can I get UT to be used on the X axis?