Home
Home allows you to move the SIS Workspace Definition (SWD) back to the extents of the first SWD view opened.
Select Home > Zoom > Home.
If you open an existing SIS Workspace Definition (SWD) the extents of that original SWD will be the “Home” view.
If however you start with a new blank Map Window and THEN add a dataset to that view, the extents of that first overlay will be the “Home” view.
If an existing SWD is opened then the initial saved view will be the "Home" view.