How would i go around editing an already open window

[Goober_taken]

very new to Love2d (just installed it) and im wondering how exactly i would go around editing an already existing window if i run a love2d program after its already been opened outside of love2d

ik this is gonna sound dumb but i had a pretty cool sounding idea for an fnf modchart and am wondering how i would move/scale the window properly without running the modchart file in love2d, and i dont wanna use lua's built in functions since those are pretty inconvenient

[Goober_taken]

when i try to run a love function it just prints this before causing the script not to work

"mods/FridayFunkin/data/cool-tt/main.lua:11: attempt to index global 'love' (a nil value)"

[pgimeno]

You can't get löve to reuse a pre-existing non-löve window if that's what you mean. Löve needs to create and manage the window in order to draw to it.