What determines layout of files in Explorer

[The Old Fart]

What determines the layout of your files when you right click Explorer &
files open up? You get to see the tree structure from My Computer with
all of your drives & folders. Along the left you have the box that has
the + sign so that you can expand the structure. I always find that
some files are expended & others are not. If I change the layout before
shutting the window the page isn't saved that way but reopens at it did
before.

 

[Guest]

Running Explorer.exe opens My Computer. Various ways to do that allow you to
insert arguments into the open command to control the location of the focus.

Command-Line Switches for Windows Explorer
http://support.microsoft.com/kb/q130510/