nconvert psd layer to jpg

[blue_cori]

Hello! I have a photoshop file with 4 layers and want to convert the file to a jpg. The jpg should be for example the highest layer (layer 4) of the psd. Is there a possibility to generate this with nconvert? Can I influence the layer to convert?

Sorry, if this is a stupid question. It's a new topic for me.

Thnx!