Oki PT340 Guide De L'utilisateur page 49

4. Then Press the FEED button three times (to select 3. Print) selects the
Print group and prints the following setting options.
Print
1.Paper Width
2.Max Speed
3.Print Density
<Set>
Press FEED button for the number of times
as the same as your selecting item, and
wait more than 1 second.
<Return>
Continue to press FEED button more than
1 second.
<Setup Menu>
Continue to press FEED button more than
3 seconds.
80mm/48columns
220mm/s
100%
47