I just got a newish PC with an amd processor, and the cpu-history graph is too cluttered with every core/thread being shown overlapping each other...is there a way to separate the cores/threads into their own frame?

Yes, of course, add a new tab and make specific entries for each or change the display by stacking the graphs (right click -> Properties)

Oh I assumed that would make a duplicate of the same tab...Now I just have to set everything one by one...is there a script capable of automating that? Also, how do I close tabs?

Thanks!

No idea if there are scripts, didn't search for. You can also download additional tabs, but so far I have no idea how to remove one.

FWIW, my knowledge about LSysguard is gathered by trying things out on my own...