On Windows Maxima plot window isn't square



When I run plot2d on the Maxima shown below, the plot window doesn't
come up as square, so circles come out as ellipses.

Note that the plot is fine as far as Maxima & plot2d is concerned; the
problem is that the aspect ratio of the window it's being drawn in is
off.

If I "resize" the window using the mouse to make it square, then the plot looks fine.

Is there any way of initializing the plot window so it comes up square by default?

Maxima 5.28.0-2 http://maxima.sourceforge.net
using Lisp GNU Common Lisp (GCL) GCL 2.6.8 (a.k.a. GCL)
Distributed under the GNU Public License. See the file COPYING.
Dedicated to the memory of William Schelter.
The function bug_report() provides bug reporting information.
(%i1)