Define extent of Inset Map using a resizable and draggable window on Main Map.
ONLY AVAILABLE ON THE INSET MAP TOOLBAR

Note: The tool's window will adjust to the aspect ratio of your existing Inset Map window when you first resize with the drag handle. If you try to make the window very small, it doesn't work so well. Zoom into the Main Map a bit first.
Our Preference - An excellent tool when working with a large fabric, because you use the Main Map as an overview to drag the tool's window to areas you want to see in detail. Much faster than repeated use of pan and zoom tools.