Currently on my system (arch linux with GNOME Shell 3.22.3) I can't resize the application window. That might be a reasonable ui choice, but personally
I feel less in control of an applicatoin if I can't resize it
It stops my normal workflow of positioning the window using super-arrowkey
It makes the window hard to move generally, since there isn't much space in the header to grab onto.
Currently on my system (arch linux with GNOME Shell 3.22.3) I can't resize the application window. That might be a reasonable ui choice, but personally