Release_notes.txt Additional information/changes in PSPLOT and/or its documentation. Plotting units in PSPLOT are arbitrary. The default is in inches. This can be changed by setting the variable conver in subroutine PSINIT. This is in contrast to the hardcopy manual, which states units must be in inches. There's an error in the documentation for subroutines arohed and farohed. The values of locxy should read 0,1, and 2, instead of 1,2, and 3.