The graph will be redisplayed so that the effect of any parameter changes will be seen, then you can proceed to add or delete markers. To add markers, use the mouse to move the cursor the desired offset on the display, then press the left button to place a marker at that location. To delete a marker, place the cursor directly over the marker you wish to delete, then press the middle mouse button. When you add a marker, it is tagged with the next available letter, and when you delete a marker all following markers are re-lettered to eliminate the gap. The right button exits this section.
Values are in pixels by which one trace is offset from the next.
When a runfile is selected, raster attempts to calculate ideal increments, but small adjustments may improve the appearance of the graph. X-increment can be a negative number. A negative Y-increment displays the traces in reverse order. Increasing the offset between traces causes the displayed traces to shrink. A UNIX shell is invoked to interpret and execute this command.