Getting a Section/Elevation of the Active Story or Selected Entities
With Use only current story feature and Use only selected entities features, the section/elevation of only the active story and/or selected objects is taken.
Location of Use Only Current Story and Use Only Selected Entities Features
You can access the features from the section/elevation settings dialog general tab.
Section without object selection
Section with use only current story is checked
Section with use only selected entities is checked
Area selected in the plan window