I'm trying to georeference a tiff in ArcMap. I want to save it as a geotiff, but when I save (to Documents\ArcGIS\Default.gdb) using Rectify->SaveAs, I don't see the saved geotiff file. Also the "Format" field in the SaveAs dialog is grayed out.
It appears that the output location in the geodatabase will not allow the .tif extension to be used. You have to save it in a folder location. Glad you were able to figure it out.