Best way to determine user's screensize?

[Ethan Furman]

On 10/30/20 6:24 PM, Grant Edwards wrote:
> On 2020-10-30, flaskee via Python-list wrote:

>> but allow the user to alter things, via preferences.
> 
> If you want to remember when a user resizes the application and
> re-open with that same geometry, that's OK. Doin't it "via
> preferences" is right out.

Why is using preferences "right out"?  Is that not the user saying where they want the app to be positioned?

--
~Ethan~