Note
The Negative Motion command specifies whether negative motion will be used, thus determining whether the full page must be buffered before printing can begin.
?&a#N#= 0 - Picture contains negative motion (page formatting printers)
1- Picture contains no negative motion (swath printers)
Default = 0
Range = 0, 1
If the page contains no negative motion, using the ?&a1N command increases print speed.
Negative motion includes:
Vertical motion toward the top of the page
Print directions other than 0 degrees
Landscape text
When the top of the character cell on the next line is above the top of the character cell on the current line
The default value of 0 delays printing until all the processing of input data for a page is complete. This is for software that needs to compose the data before printing.
A value of 1 allows data to be printed as received, rather than first stored in a buffer. Otherwise, printing will be delayed until all processing of input data is complete.
This command must be sent before any printable data is received by the printer.