Prerequisite
You cannot select more than one are at a time.
Steps
-
In the Scan View, click Edit scan.
-
In the Mesh Edition
Tools
window, click
-
In the 3D view, click points on the
mesh to draw a closed path around the surface
that needs to be removed.
-
If necessary, drag the points to refine their position.
Note: Consider using the

icon to remove all points or the

to revert the selection.
-
Click Select
Note: The area that will be removed will turn yellow.
-
Click Delete.
Note: If the removed area is not what you expected, use the

icon to revert
to the previous state of the mesh.
Result
The selected surface is removed from the scan.