Sets the selected buildings active. Only active buildings are included in the noise calculation.
Find it here:
MOUS_ICO Menu: Noise > Buildings > Active
MOUS_ICO Menu: Noise > Buildings > Dialog box
MOUS_ICO Select one or several buildings in the list
MOUS_ICO Dialog box: Active
nco: Select a passive building (defined in Novapoint Noise)
MOUS_ICO Popup menu: Active