Delete right mouse button option in Feature Tree Outline

The Delete function is also available in context menus (right mouse button) accessed in the feature Tree Outline. A feature or sketch may be deleted if it is not used to define any other feature. Cross sections may be deleted if they are not assigned to any line bodies. The Delete function can also be used to "Cancel" the creation of a new feature.

Note that while a new feature is being created, no other feature in the model can be deleted.