The Split tool is extremely useful cutting and splitting objects. For example you could use…
Vectorworks Tip #039 – Basic Tools – Usefully Name Viewports
It is easy to create a set of drawings with a lot of viewports and Vectorworks will automatically name them for you, but if you let Vectorworks do this for you, the viewport name will not let you see where that viewport has been used. In this image you can see some of the viewports have the viewport number/sheet number. Other viewports tell you what they are. This makes it easy to know where these viewports are located.