I found it, "EDp1" 
Thanks! Did not receive any error messages. But if I go under settings, it still says the same resolution 1300x ... But it may not change !?
Well! That is not the main problem. Can live with a little lower resolution, but must be able to edit my movies! But you do not think that the resolution setting is the cause of the problem with lagging in the movie editor ...? Do you think it helps to change the distributor of Linux (peppermint?)? ... and if so, to what? But as I understand it, Zorin requires less computer capacity ...