Epson 10020 - Manual (Page 142)

Use the arrow keys to highlight the desired communication
speed and then press Enter.
Parity
To set the type of parity check, highlight Parity and press
Enter. You see the following choices:
None
Odd
Even
Highlight the desired type of parity check and press Enter.
Data length
To change the data length value, highlight Data length
and press Enter. The number changes from 8 to 7, or from 7 to
8. Press Enter again
if you want to change back to the other
number.
Stop bits
To change the number of stop bits, highlight Stop bits
and press Enter. The number changes from 1 to 2, or from 2 to
1. Press Enter again if you want to change back to the other
number.
A-12 Changing DIP Switches and Using Setup