How do I use the Terminal effect?
The OP-1 Field does not have an effect called "Terminal." The available effects listed in the manual are CWO, Grid, Nitro, Mother, Phone, Spring, and others, but Terminal is not among them.
Check your current effects list
To browse all available effects on your unit, press T3 to open the FX screen, then press shift + T3 to open the effects browser. Turn the blue encoder to scroll through the full list of effects installed on your device.
If you saw "Terminal" somewhere
It may have been a third-party or community name for an effect, or it could refer to a feature from a different device. Double-check the spelling against the effects browser on your own unit, as firmware updates can occasionally add new effects not covered in the printed manual.
Getting more help
Hold shift + help on your OP-1 Field to open the built-in user guide, which reflects your current firmware version and may list effects not covered here.