In the Modify Sub Elements Mode there is no Selection Filter available in the Ribbon. The one in the Status Bar is available (bottom right of the screen). The problem is that there is no distinction between the different elements you select. I would expect to see Boundary Points, Interior Points, Boundary Lines, Split Lines and Folding Lines. But what I get is "*Partially selected elements". If I want to select a bunch of Folding Lines to convert them to Split Lines I have to select them manually, no option to go through the Selection Filter. I would like to see this enabled so I have more control over what I'm doing and see the total of all the different Points and Lines.
