DXF OUT SELECT OBJECTS

Hello, i just started using Draftsight a few months ago but have been using AutoCAD for about 10 years. I pretty much have things set up the way i need them to be, but i cant find a way to DXF out select pieces of a drawing instead of the entire drawing as a whole. it hasn't been a deal breaker by any means but it would be nice if i could find a way to do that again if possible.

In AutoCAD once you type in DXFOUT you would be prompted with a menu asking where you wanted to save the file, you would then click on the opitons tab a select "select objects" which would then allow you to drag a box around what it was that you wanted to export, then hit enter and only that geometry would be output.

Thank you.