Problem: is it Vim or cygwin/bash setting?

[rich coco]

In an older B20 release of cygwin, when i used Vim to edit a file and
eventually exited, my window reverted to the state it was in prior to
the vim session (ie, the text being editied by vim is no longer
visible).

I upgraded to the latest cygwin release (i was missing groff,
ghostscript, lots more...) and noticed that the above behavior - which i
prefer - does not occur. That is, when I quit my Vim session, the text I
was editing stays on my screen, clobbering the pre-vim context.

i cannot determine if this is a Vim configuration thing or a
shell-configuration thing.
What can I modify - if anything - to get the behavior i want?

Tia,

- rich

--
rich.coco@verizon.net