leave last-used region boundaries from a project in "Export" dialog box

[andyroo]

I go into another piece of software to choose my region boundaries from GIS when generating orthoimages and DSM. And once I have the surface optimized with GCPs, I export both the orthoimage and the DSM - sometimes I even export a few orthoimages, disabling blurry images for areas of interest. It would save me significant time if I could define the region once and it would stay there.