Not quite sure how your input pedal works…is it a switch type or continuous controller
Either way, assuming your pedal outputs a MIDI controller…
Add [Click “+” top left] a Generic Remote panel
Map it to your Midi controller [i.e. select the controllers MIDI source in the Midi Input & Midi Ouput]
Assuming this is a New panel that you have just added, or that you don’t use the Generic Remote for anything else, you can delete any entries that are in the 2 panels. Just select the uppermost entry in the top panel, press Delete, and continue until the panel is empty. [This will also delete the equivalent entries in the bottom panel.]
Now Add 1 instance, which will be placed in the top and bottom panels.
Essentially, Generic Remote maps an input [top panel] to a Nuendo function [bottom panel].
Each instance in the top panel is directed to the same instance in the bottom panel. So entry 1 top is directed to entry 1 bottom, etc.
So, in the top panel, enter the controller event/channel/Address [=Controller No.] that will come from your pedal.
The “Control Name” will allow you to enter a meaningful name for your action, and this will be copied to the bottom panel when the mapping is complete.
Now, in the bottom panel, under “Device”, select “Command” from the dropdown. So you are now mapping your controller event from your pedal to some command in Nuendo.
Next, Under “Channel/Category”, select “Transport” from the dropdown…you should now see where we are going!
Finally, under “Value Action”, you are offered the available commands from the “Transport” submenu.
Included here are events like “Locate Next Marker”, “Locate Previous Marker” etc.
There are further options available [flags], but this should certainly get you started…