Positional information is usually expressed in inches. A conversion factor\ can be given for other units, such as "cm". The new coordinate values are derived from the product "fac*x" where x is the input value. A negative value or zero resets the scaling factor to unity. Note that the initial factor can be specified in FRAME. The subroutine FACTOR calls PFACTOR, RFACTOR, and VFACTOR which change the scale factors for the metafile, Ramtek, and terminal packages, respectively. These routines can be called separately to affect only the scale factor of the particular package.
CALL FACTOR (fac)
fac (R): new conversion factor for coordinate values (all packages)
<= 0 : scale factor reset to unity
> 0 : new scale factor