Some graphical programs make use of a window which the user can scale unlimitedly but still disable the maximize option (for whichever dumb reason).
[EDIT]: The window might be a subwindow of another window (don't know the technical term), and it is the only window (of the application instance) that can be interacted with until it is closed, like a dilog.
I use Linux Mint with Cinnamon, using X11 I believe.
Although this would help temporarily, I am ultimately not looking for a window manager command line which resizes the window but I want to change the window flags themselves, without having access to the source code and without being specific to one particular program.
Rant: It appears to me that some programmers or UI designers want to force their view on a program, inconsiderate of the needs and preferences of the end user, ignorant of what actually is the optimal work flow in the end.
