Plane Inside
Function Description: Draw a plane, and select the points inside the plane.
Steps
1.After clicking the Plane Inside 
button, it enters a selected state, activating the function.
2.Identify and highlight (in red) the point cloud within the selected region, as shown in the image.
Candidate region
Result image
3.When a plane is drawn and there are no points on the plane, a popup dialog will appear to notify.
Notification
4.After the first selection is completed, you can perform another selection based on the initial selection.
5.Each selection will add or subtract selected regions based on the toggle selection state.
Note: This feature is applicable only to point cloud data.