nroff and troff are UNIX-based formatting systems.
nroff is a textual formatting system that prepares output for standard ASCII devices such as terminals, disk files, and printers. You can activate nroff directly from the Documentor using the Format option on templates attached to the troff formatter.
troff is a graphical formatting system that prepares output for laser printing devices. Despite the difference, these systems are compatible in that troff can use nroff input files to produce final output. troff cannot be activated directly from the Documentor.
● nroff input requires preprocessing for commands used with equations and tables. If you use such commands in your template or include files, you should not activate nroff directly from the Documentor. The Documentor does not support preprocessing of output before sending it to nroff.
●For information on troff and nroff, see the UNIX system documentation for your computer.