I have the user profile panel and I want to load in the panel a node that is referencing this user. There is a trick to load a view in the panel,but I don't know exactly how to do this... Can somebody help me on this?thanks
You'll want to add a display to your view of type "pane". Give it a descriptive title so you can find it from your Page Manager.
Then you'll create a Page Manager variant that displays on the entity (user) to which you want to attach this view. Under "content" you'll click the gear that appears in the top left, and click "add content". Select "view panes" and then select the view pane you just created.
In order to pass the node ID to the view pane, you'll go back to the view. Under "pane settings" select "argument input" and set it to "from panel argument". You'll probably want the first argument.