Right now, Fusion360 default export format is always set to save as .f3d.
Whoever exports knows already you have to set the option over and over again, if you save to anything else, formats like .iges, .fbx or .ob.
I'm often exporting so It would be nothing less than fantastic if Fusion360 could remember which export format was used the last time on the export. Also it should also work on the so-called global level and not just for the current project.
+1 if you agree, ignore this post if your time is not valuable.