I have several different overlays on the same brain surface. When I want to run freeview in command line and take screenshots automatically, I need to restart freeview and load the surface for each screenshot. Is it possible to keep the program on and only change overlays and take screenshots for each of them? It seems possible in GUI but I don't know how to realise in command line.

Another question is, when I have the overlay on, before taking the screenshot, is it possible to mark a location, by e.g. a dot/circle/square/cross/etc, the colour of the marker shall be independent of the overlay.  I have the index  of this location in the surface vertices. 

Thank you in advance.

best

Peng