How do I prevent Gnus from changing the window layout?

Question

When I open a group in Gnus, it insists on resetting the window layout and using the entire frame for the group buffer.

I'd rather manage the window layout myself, so how can I make Gnus not change it for me?

Answer 1

Set the variable gnus-use-full-window to nil. The manual warns against doing so:

Setting this variable to nil kinda works, but there are glitches. Use at your own peril.

But I haven't seen anything I'd call "glitches" related to that.