How to add event markers for motor imagery training set?

in OpenBCI_GUI
I need to collect raw signals along with stimulus onsets (annotation) for epoching. Is there a way to do signal acquisition with event markers (not by external button trigger) in OpenBCI GUI? if not, could you please some tools/software such as OpenVibe for creating the same?
Comments
Hi Mukil,
There is a planned addition for the GUI to do this. But not yet available. No timeline.
https://github.com/OpenBCI/OpenBCI_GUI/issues/1091
If you use Brainflow, it has a marker facility. And LabStreamingLayer also has markers. GUI can output in LSL via the Networking Widget.
William