we're using the Bitalino in psychological research settings with our students. Right now, we are using a push-button connected to a digital input port to place markers in the data (beginning of experiment, stimulus onset, ...). For some settings, when our participants are wearing the device attached to their belt, that's not a very convenient option. Is there a way, e.g. via keypress, to place such markers directly in OpenSignals? In the manuals, I did not find such an option.