Jeff, I understand how this might be useful if you have several viewports that are all showing the same drawing elements such as different views of the same elements. However, when creating a full set of construction documents with 40 to 150 pages and 75 to 300 viewports this is a MAJOR problem. As is very customary when producing architectural and engineering document sets, whether using Turbocad, AutoCAD, or some other software, individual pages with sometimes multiple viewports are created showing ONLY what is intended to be displayed in that viewport (i.e. individual structural elements of a section view, etc.). As changes and additions inevitably happen, modifications to elements in existing layers and addition of new layers and elements occur. With the current behavior of V2016, every time a new layer is created in a file with an already large number of viewports, every viewport in the drawing is affected resulting in things being displayed that were not originally intended to be displayed. This ends up requiring LARGE amounts of time to fix. This might not be much of an issue if you're only drawing in 2d and spread out across model space. It's a major issue however, when 3D modeling and all of the drawing elements are grouped together in a small area in model space. In this circumstance, a large number of created views will be capable of seeing everything on every layer if that layer is turned on.