Can you adjust x/y placement in the node editor?

Is I know you can use the node editor to layer pre-rendered movie files but is there a way to adjust there placement in x/y space? Also, is there a pipeline for using the seq editor and the nodes in one output?

is there a way to adjust there placement in x/y space?

Use a Translate node (in the Converters group).

I don’t think you can pipe Sequence editor output directly to nodes, at least in 2.42a. It’s been asked here before.

you can, however, send node output to the seq editor by just adding a scene strip to the editor