5. FX Only (Manual Mode) - You can choose to use your POD HD300 as
a multi-fx unit without adding the character of the POD HD300 Amp
Modeling. You might prefer this when using your POD HD300 in front
of your guitar amp. Pressing the FX Only button illuminates the red
LED and globally disables Amp Modeling. Now, only Smart FX and
Reverb will be applied to the guitar signal.
Manual Mode: Press and hold this button to bypass current presets
shown in your display. Now your physical knob positions, where each
knob is set, will determine settings and sounds. When in Manual Mode
your 7 Segment Display will read ---. Selecting or saving any preset will
automatically return you to Preset mode, where all effects and settings
are loaded per preset.