How to add a session? for single group repeated measure design [baseline and follow up]

Hi Alfonso,

I have resting state for 1 group at 2 x assessment times, pre and post intervention.
I am not sure how to add in the GUI, i.e., what to click, to add baseline and follow up data separately, for each subject.
In the setup window, I can see the 'sessions', I am right clicking on the icon to add one session but it does not create any options for me.
Do you have any advice?
Thank you in advance and have a lovely day,
Vale