# The Master xmh Window

When you start xmh running, it opens a main window. I call this first main window the master window. There are two important differences between the master window and other main windows:

1. Geometry settings affect the master window differently from all other windows. See the Sections Command-line Settings and TocGeometry.
2. Using the `Close Window` command (on the `Folder` menu) in the master window terminates xmh. But xmh won't terminate if you have other main windows open -- you have to close them first.

   If you have another main window open and use its `Close` `Window` command, only that window will close.