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BLPU Extent Manager is a batch to quickly capturing Provenances (BLPU Extents).
Yellowish layer contains property outlines from Land Registry.
a) Click on it to confirm that Land Registry polygon should be used as BLPU extent for the property contained within this polygon (BLPU point/black dot),
b) Hold SHIFT button and drag the mouse to confirm multiple Land Registry polygons to multiple BLPUs in one move,
c) Hold CTRL button and drag the mouse to capture a single BLPU extent made of TopoArea polygons – polygons will be automatically merged.
d) When you are happy, hit the Save button and polygons will be added as provenances to confirmed BLPUs.
Please note that only parent BLPUs are listed and when you hit Save button all children will also inherit new extents.