If it is necessary to delete vertices on the Opening Section boundary, this can be done with the Delete Vertices option. Delete Vertices is available in the Sidebar, the menu, or as a right-click option for individual vertices.
To delete vertices:
First make sure the Opening Section View is selected.
Select Delete Vertices from the Sidebar, the Opening menu or the right-click menu.
You can select individual vertices by clicking on them with the left mouse button, or you can select multiple vertices by drawing a window around them (click and hold the left mouse button, and drag to create a window).
When you are finished selecting, press Enter or right-click and select Done.
All selected vertices will be deleted and the Opening Section will be redrawn using the remaining vertices.
Individual vertices can be deleted using a right-click shortcut, as follows:
Locate the cursor over a vertex that you wish to delete.
Click the right mouse button, and the vertex will be "selected".
A popup menu will appear, from which you can select the Delete Vertex option.
Select Delete Vertex and the vertex will be deleted.