R - Commands  
REGION_BY_IP (command)
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It creates a region by defining an inner point

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 Command line: REGION_BY_IP

 

It is possible to create regions by inner point with the REGION_BY_IPcommand.
The following prompt is displayed: Pick a point inside the region or [Tolerance/add Islands/Undo]<0.000000>: select point or press  T to set tolerance,  I to add islands,  U to undo.
Specify a point near the perimeter of the region to be created.
The result of the operation will be displayed.
The perimetrical objects will be converted into an island.

 

Also see:

REGION