Hi Jeff, Yes there are a few subclasses that can be exported. route keepout (top/bot), package keepout(top/bot), via keepout(top/bot), panel_outline, outline, package max height, place_bound(top/bot) subclass layers are most common. If you get a chance read "Best practices: Working with IDF". Do a search on sourcelink or CDSdoc for "Best practices: Working with IDF". Regards, -oscar ____________________________________________________ oscar miguelino | lead pcb engineer | OQO, inc. 583 shotwell street | san francisco, ca 94110 (this message constitutes confidential information proprietary to OQO, Inc.) On Wed, Jul 2, 2008 at 5:01 AM, jeff <id_limestone@xxxxxxxxx> wrote: > > > Can a layer other than Place_Bounds_Top be used when exporting an IDF file? > > > > Jeff > >