IBM 6400 Operation Guide - Page 26

using the operator panel Line Feed This key operates only in NOT READY state. Press Stop to place the printer in the NOT READY state. (See page 14.) In NOT READY state, press to move the paper up one line, as defined by the existing active line spacing. Line Feed will repeat if it is held down. If there is any data in the buffer, it will print, then the paper will move up one line. note The data that prints is all of the data contained in the printer buffer. The data not in the print buffer is not affected. View In NOT READY state, press view to move the current print position up to the tractor area for viewing. This allows you to check the print location. If there is any data left in the buffer, the data will be printed, then the paper will move up for viewing. Press View a second time to return the paper back to the position when the View key was pressed. note Pressing Start instead of pressing View a second time performs the same function as pressing View a second time and puts the printer in READY state. Pressing Stop instead of pressing View a second time moves the paper back to its original print position and puts the printer in NOT READY state. 12 Line Feed View Operator's Guide