[PLUG] Raspbian stretch default window manager.

[michael]

First off, what is Raspbian Stretch's default window manager?

Second question, does this window manager take an inch off of all sides 
of the screen by default?  The Viewsonic
projector before I connect via the hdmi projects a wider and taller 
picture, the classic Viewsonic parrots.  The
image from the Pi is an inch smaller on all sides.  I need to project 
full size.  I tried zoom 1.1, there is no
way to trigger that from the Pi and opening chromium I realised that the 
browser was off the screen because of the
zoom.