XVIRTUALMIN

Syntax: SET XVIRTUALMIN n
GET XVIRTUALMIN { n }
Default: XVIRTUALMIN = XMIN

XVIRTUALMIN controls the virtual minimum value for the x-axis. If XVIRTUALMIN is less than XMIN, the actual x-axis minimum value will be XMIN, while the large, numbered, tic marks will begin at XVIRTUALMIN, which may be 'off the end' of the x-axis.

XVIRTUALMIN is always set to XMIN whenever XMIN is set, so you must set XVIRTUALMIN after XMIN.