What is the High Speed setting in the Epson driver?

The High Speed printing setting relates to the printing method of the printer.

• When High Speed mode is selected in the Epson printer driver, the printer prints in both directions (from right to left, then left to right [bidirectional printing]). Select this mode to obtain the fastest image printing - please note that as a result the quality of the print may be affected.
• When High Speed mode is not selected or turned off, the printer prints in one direction only (from right to left [unidirectional printing]). Unidirectional printing is slower than bidirectional printing, and recommended for highest quality image printing.

Note:
This setting may only be available on certain quality and paper selections, depending on the driver.