Use the newly added Fill Bounded Area Mode to automatically fill empty areas that are bounded by various objects from line or area symbols.
The area, that is entirely surrounded by objects will be filled with the selected symbol. If the area is not surrounded entirely by objects, the current view of the drawing window will be filled.
If you work with orienteering symbol sets (ISSprOM 2019, ISOM 2017), the function will ignore certain symbols like contours and north lines.